Palladium-Catalyzed Enantioselective Alkenylation of Sulfenate Anions
作者:Chen Wu、Simon Berritt、Xiaoxia Liang、Patrick J. Walsh
DOI:10.1021/acs.orglett.8b03943
日期:2019.2.15
A novel approach to synthesize enantio-enriched alkenyl/aryl sulfoxides is achieved by using CsF to generate sulfenate anions and conducting the catalytic enantioselective alkenylation with [Pd(allyl)Cl]2/(2R)-1-[(1R)-1-[bis(1,1-dimethylethyl)phosphino]ethyl]-2-(diphenylphosphino)ferrocene (SL-J002-1). A wide variety of sulfoxides bearing sensitive functional groups are produced with high yields (up
Synthesis of Polycyclic Nitrogen Heterocycles via Cascade Pd-Catalyzed Alkene Carboamination/Diels–Alder Reactions
作者:Derick R. White、John P. Wolfe
DOI:10.1021/acs.orglett.5b00896
日期:2015.5.15
Cascade Pd-catalyzed alkenecarboamination/Diels–Alder reactions between bromodienes and amines bearing two pendant alkenes are described. These transformations generate 4 bonds, 3 rings, and 3–5 stereocenters to afford polycyclic nitrogen heterocycles with high diastereoselectivity.
[EN] DIELS-ALDER CONJUGATION METHODS<br/>[FR] PROCÉDÉS DE CONJUGAISON DE DIELS-ALDER
申请人:REGENERON PHARMA
公开号:WO2021211984A1
公开(公告)日:2021-10-21
Described herein are protein-payload conjugates and compositions thereof that are useful, for example, for target-specific delivery of therapeutic and/or imaging agent moieties. In certain embodiments, provided are specific and efficient methods for producing protein-payload constructs (e.g., antibody-drug conjugates) utilizing a combination of transglutaminase and Diels-Alder techniques. Antibody-drug conjugates and compositions which comprise glutaminyl-modified antibodies, Diels-Alder adducts, and reactive payloads and are provided.
A route for the enantioselective total synthesis of antheridic acid, the antheridium-inducing factor from anemia phyllitidis
作者:E.J. Corey、Hideo Kigoshi
DOI:10.1016/s0040-4039(00)93418-x
日期:1991.9
An effective route for the total synthesis of antheridic acid (1) has been devised in which the initial chiral intermediate 7 is generated by enantioselective catalytic reduction and transformed in a stereocontrolled fashion into key intermediates 9, 10, 13, and 2.
Boronic Ester Enabled [2 + 2]-Cycloadditions by Temporary Coordination: Synthesis of Artochamin J and Piperarborenine B
作者:Yanyao Liu、Dongshun Ni、M. Kevin Brown
DOI:10.1021/jacs.2c08777
日期:2022.10.19
A strategy for the photosensitized cycloaddition of alkenylboronates and allylic alcohols by a temporary coordination is presented. The process allows for the synthesis of a diverse range of cyclobutylboronates. Key to development of these reactions is the temporary coordination of the allylic alcohol to the Bpin unit. This not only allows for the reaction to proceed in an intramolecular manner but
提出了一种通过临时配位对烯基硼酸酯和烯丙醇进行光敏环加成的策略。该过程允许合成各种环丁基硼酸酯。这些反应发展的关键是烯丙醇与 Bpin 单元的临时协调。这不仅允许反应以分子内方式进行,而且还允许高水平的立体和区域控制。这些研究的一个关键方面是环加合物在合成复杂的天然产物 artochamin J 和 piperarborenine B 中的效用。