Core Viewpoint - The article discusses a significant breakthrough in the direct conversion of alkenes to alkynes, addressing a long-standing challenge in synthetic chemistry that has persisted since 1861. This advancement is expected to enhance the availability of diverse alkynes for applications, particularly in drug development [3][4]. Group 1: Research Background - Alkenes and alkynes are fundamental to modern synthetic chemistry, with numerous Nobel Prizes awarded for related breakthroughs. However, the supply of alkynes is limited compared to alkenes, which are more abundant and affordable [3]. - The research led by Professor Jiao Ning's team at Peking University published in Nature outlines a method using a selenium-based reagent to overcome the harsh conditions historically required for alkene to alkyne conversion [4][5]. Group 2: Methodology and Innovation - The team utilized a novel strategy called "cascade activation" and "entropy-increasing reconstruction," building on years of experience in carbon-carbon bond reconstruction. This approach allowed them to identify a selenium-containing compound, Selenanthrene, as a key reagent for the conversion process [5][6]. - Selenanthrene, which has been largely overlooked in synthetic chemistry for over a century, was found to possess dual capabilities for activation and leaving group potential, enabling efficient conversion of alkenes to alkynes under mild conditions [6]. Group 3: Reaction Conditions and Compatibility - The new method demonstrates excellent functional group compatibility, allowing for the transformation of sensitive substrates such as halides and various active groups, including aldehydes and amines, under mild conditions [6][10]. - The research also achieved the conversion of both cis and trans alkenes, showcasing a broad substrate applicability and expanding the potential supply of diverse alkynes [10]. Group 4: Mechanistic Insights - The team conducted an in-depth analysis of the reaction mechanism, developing strategies for stereoselective transformations, including the interconversion of cis and trans isomers, which were previously challenging to achieve [8][10].

Core Insights - The article discusses a novel strategy for alcohol group migration editing, which allows for the predictable regional and stereoselective relocation of common alcohol functional groups to adjacent sites [5]. Group 1: Research Findings - The research team from MIT, led by Alison E. Wendlandt, published a paper in Nature detailing a method that utilizes proximity-enhanced hydrogen atom abstraction for alcohol group migration [3]. - This reaction occurs under reversible hydrogen atom transfer conditions catalyzed by excited state decatungstate anions, enabling efficient formation of radicals at polar mismatched sites due to non-covalent interactions [5]. - The tool's application in late-stage synthesis allows for precise repositioning of alcohol functional groups, providing a new strategy for constructing challenging oxyfunctional patterns when combined with common alcohol introduction methods [5].

Core Viewpoint - The National Natural Science Foundation of China has announced the public disclosure of information related to the expert-recommended original exploration plan projects funded by the Chemistry Science Department for the year 2025 [2] Group 1 - The announcement is in accordance with the implementation plan requirements of the original exploration plan [2] - The information pertains specifically to projects recommended by experts within the Chemistry Science Department [2] - The public disclosure date is set for January 20, 2026 [2]

Core Viewpoint - The article discusses a novel pericyclic reaction called triatropic rearrangement, which allows for high selectivity in editing saturated carbon ring frameworks, providing new pathways for the precise editing of complex cyclopentane and natural product scaffolds [4][6]. Group 1 - The research was conducted by Associate Professor Dong Zhe and Assistant Professor Yu Peiyuan from Southern University of Science and Technology, and published in the prestigious journal Science [3]. - The triatropic rearrangement reaction simultaneously breaks three σ bonds and forms two σ bonds and one π bond in a single transition state, enabling stereoselective transformations of carbon-oxygen bonds in epoxides into carbon-carbon bonds [5]. - This strategy allows for highly selective carbon migration reactions in epoxidized cycloalkanes, generating cyclized products with high chemical, regio-, and stereoselectivity [5]. Group 2 - The triatropic rearrangement reaction can be modularly combined with classical reactions, offering a unique "[4+2–1]" strategy for constructing complex cyclopentanes [5][6]. - The research highlights the broad applicability and high stereocontrol of the triatropic rearrangement, making it a significant advancement in synthetic chemistry [4][6].

Core Insights - A collaborative research effort between Chinese and Dutch scientists has successfully synthesized a dynamic polymer with a distinct double-helix structure, inspired by the Shanghai Tower's architecture, marking a significant advancement in biomimetic smart materials [2][3]. Group 1: Research Background and Inspiration - The research was conducted by the Nobel Prize-winning scientist team at East China University of Science and Technology, inspired by the Shanghai Tower, which is the tallest building in China and the third tallest in the world, completed in 2016 [3]. - The unique double-helix appearance of the Shanghai Tower not only provides aerodynamic stability but also resembles spiral structures found in biological systems, such as DNA and certain proteins [3]. Group 2: Polymer Characteristics and Functionality - The synthesized polymer exhibits dynamic behavior similar to natural proteins, capable of expanding and contracting with temperature changes, fully unwinding under specific conditions, and ultimately degrading into absorbable small molecules without residual risks [2][5]. - The polymer's structure is maintained through a combination of dynamic covalent bonds, particularly reversible disulfide bonds, and rigid amino acid backbones, allowing for both flexibility and stability [4][5]. Group 3: Potential Applications - This material shows promise for use in next-generation wearable or implantable medical devices due to its excellent mechanical flexibility, biocompatibility, and complete degradability [5]. - Potential applications include flexible neural interfaces, targeted drug delivery systems, and tissue engineering scaffolds, which can adapt to complex mechanical environments within the body and safely metabolize after fulfilling their purpose [5]. Group 4: Broader Implications in Nanotechnology - The research aligns with the broader mission of chemistry to bridge physical laws and biological phenomena, emphasizing the complexity that can arise from simple molecular building blocks [6]. - The development of molecular machines and nanotechnology has the potential to revolutionize various fields, including precision medicine and environmental remediation, by enabling the construction of materials with specific functions at the molecular level [7][10].

Core Idea - The article highlights the innovative contributions of Barry Sharpless, a two-time Nobel Prize-winning chemist, particularly focusing on his philosophy of simplicity in chemistry, exemplified by his development of click chemistry, which has transformed the field by emphasizing functional molecular synthesis over complex structures [5][6]. Group 1: Background and Personal Journey - Barry Sharpless's early experiences as a child fishing in New Jersey shaped his curiosity and passion for discovering new biological entities, which he likens to his pursuit of interesting chemical reactions [2]. - Despite losing vision in one eye due to a laboratory accident at age 29, Sharpless continues to explore the field of chemistry with resilience, believing in the potential of serendipitous discoveries [2][4]. Group 2: Click Chemistry - Click chemistry, introduced by Sharpless in 1998, aims to simplify chemical synthesis by focusing on functional outcomes rather than complex structures, challenging the prevailing academic belief that complexity equates to advancement [5][6]. - Sharpless faced initial rejection from top journals for his click chemistry papers, but the concept eventually gained recognition, leading to his second Nobel Prize in Chemistry in 2022, validating its impact on the field [5][6]. Group 3: Academic Philosophy and Approach - Sharpless emphasizes a practical and straightforward approach to research, often discarding ideas that do not yield results quickly, which he believes fosters innovation [4][5]. - He expresses disdain for the competitive nature of academic publishing, preferring to focus on the completion of research rather than the politics of authorship [3][4]. Group 4: International Collaboration and Influence - Over the past decade, Sharpless has established strong academic ties with China, frequently visiting Shanghai to collaborate on research and promote international scientific cooperation [8][9]. - He has been instrumental in mentoring Chinese students and researchers, contributing to the development of a new generation of chemists in China, who are now shaping the future of the field [9].

Core Viewpoint - The establishment of the Biomedicine Materials Chemistry Professional Committee by the Chinese Chemical Society marks a significant step in advancing research and collaboration in the field of biomedicine materials [1] Group 1: Committee Formation - The founding conference was held in Shenzhen, combining both offline and online participation, with over 40 representatives from research institutions, universities, and hospitals attending [1] - Professor Hou Yanglong from Sun Yat-sen University was elected as the first chairman through a secret ballot [1] - The committee also elected four vice-chairmen: Academician Chen Xuesi from the Chinese Academy of Sciences, Professor Li Zhibo from Zhejiang University, Professor Yang Huanghao from Fuzhou University, and Professor Yuan Qian from Wuhan University [1] - A total of 56 committee members were elected, and Wang Shuren from Peking University was appointed as the secretary-general [1] Group 2: Future Plans and Discussions - Chairman Hou Yanglong introduced the future work plan for the committee [1] - Committee members engaged in discussions regarding organizational development, future growth, and academic activities, proposing multiple suggestions [1]

Core Viewpoint - The article discusses a significant advancement in the asymmetric synthesis of N-chiral compounds, highlighting a collaborative research effort that successfully achieved the first catalytic asymmetric synthesis of these compounds, which is crucial for future studies in this area [4][5]. Group 1: Research Background - The research was conducted by a team from Southern University of Science and Technology and UCLA, focusing on controlling pyramidal nitrogen chirality through asymmetric organocatalysis [4]. - The study addresses the challenges associated with the instability of nitrogen stereocenters and the limited success in asymmetric synthesis of non-cyclic N-chiral compounds [5][7]. Group 2: Methodology and Findings - The team proposed a method to synthesize challenging non-cyclic N-chiral chlorohydroxylamines through asymmetric chlorination reactions, capturing unstable chiral intermediates to obtain more stable N-chiral molecules [7]. - A significant breakthrough was achieved using a chiral phosphoric acid catalyst, leading to the successful synthesis of 21 N-stereocenters with high enantioselectivity [8]. - The research demonstrated that introducing a rigid bicyclic structure near the nitrogen atom significantly improved the stability of the configuration, reducing racemization [10]. Group 3: Mechanism and Results - The study confirmed that the key step for stereoselectivity was the chlorination reaction, followed by an intramolecular nucleophilic substitution that adhered to the S N 2 mechanism, ensuring effective transfer of chirality [10]. - The final products exhibited enantiomeric excess values greater than 90%, showcasing the method's effectiveness and broad applicability [10].

Core Viewpoint - The research team led by Zhang Xiaoheng from the University of Chinese Academy of Sciences has developed a groundbreaking method for direct deamination functionalization using N-nitrosamines, which challenges the traditional industrial processes that have been in use for 140 years [1] Summary by Relevant Sections Research Breakthrough - The new method allows for the direct transformation of aromatic amines into various C-X bonds (including carbon-halogen, carbon-oxygen, carbon-nitrogen, and carbon-carbon bonds) through the in-situ formation of N-nitrosamine intermediates under nitric acid mediation, followed by the removal of dinitrogen oxide [1] Industrial Implications - This innovative approach addresses several issues associated with the traditional stepwise strategy, such as the instability and explosive hazards of diazonium salts, significant copper consumption, and limited substrate compatibility [1] Practical Application - The research team has also developed a one-pot deamination cross-coupling strategy, enabling multiple cross-coupling reactions to be completed within the same reaction system by simply adding the corresponding coupling reagents to the deamination intermediate [1] Scalability - The new method can efficiently achieve kilogram-scale synthesis of target products using common laboratory reagents, making it applicable in pharmaceutical and materials manufacturing sectors [1]

Core Viewpoint - The article discusses a groundbreaking research published in Nature, which introduces a new method for direct deaminative functionalization using N-nitroamines, providing a safer and more efficient alternative to traditional aromatic amine transformations that rely on hazardous diazonium salts [1][2]. Group 1: Research Breakthrough - The research presents a novel approach that allows for the direct conversion of inert aromatic carbon-nitrogen (C-N) bonds into various important chemical bonds, including carbon-halogen, carbon-oxygen, carbon-nitrogen, and carbon-carbon bonds [1][2]. - This method utilizes common laboratory reagents and enables kilogram-scale synthesis, challenging the traditional processes that have been in use for 140 years [2][3]. Group 2: Industrial Implications - The new strategy is expected to have broad applications in critical fields such as pharmaceuticals and materials manufacturing, offering a safe and economical alternative to the widely used but hazardous aryl diazonium chemistry [2][3]. - The direct deaminative functionalization method simplifies the synthesis process and subsequent functionalization by combining deaminative functionalization with transition metal-catalyzed arylation [2][3]. Group 3: Mechanism and Advantages - Mechanistic studies indicate that the reactivity of the aromatic carbon cation equivalent during the deamination process is typically dominant, highlighting the potential of this method in synthetic chemistry [3]. - The direct deamination approach provides a significant advantage over other deaminative functionalization methods, as it is applicable to a wide range of drug-relevant heteroaryl amines with varying electronic and structural properties [2][3].