Cu(I)/Chiral Bisoxazoline-Catalyzed Enantioselective Sommelet–Hauser Rearrangement of Sulfonium Ylides
作者:Shu-Sen Li、Jianbo Wang
DOI:10.1021/acs.joc.0c01590
日期:2020.10.2
asymmetric thia-Sommelet–Hauser rearrangement of sulfonium ylides remains a great challenge due to its multistep reaction mechanism involving metal carbene formation, proton transfer, and [2,3]-sigmatropic rearrangement. In particular, the key problem of such reactions is the differentiation of the enantiotopic lone pair electrons of sulfur, which generates the sulfonium ylide intermediate bearing chirality
Iron-catalysed enantioconvergent Suzuki–Miyaura cross-coupling to afford enantioenriched 1,1-diarylalkanes
作者:Chet C. Tyrol、Nang S. Yone、Connor F. Gallin、Jeffery A. Byers
DOI:10.1039/d0cc05003b
日期:——
The first stereoconvergent Suzuki–Miyaura cross-coupling reaction was developed to afford enantioenriched 1,1-diarylalkanes.
第一个立体对映选择性的铃木-宫浦偶联反应被开发出来,用于合成手性富集的1,1-二芳基烷烃。
Enantioselective Reduction of Ketones and Imines Catalyzed by (CN-Box)ReV-Oxo Complexes
作者:Kristine A. Nolin、Richard W. Ahn、Yusuke Kobayashi、Joshua J. Kennedy-Smith、F. Dean Toste
DOI:10.1002/chem.201001164
日期:2010.8.16
application of chiral, non‐racemic ReV–oxo complexes to the enantioselectivereduction of prochiral ketones is described. In addition to the enantioselectivereduction of prochiral ketones, we report the application of these complexes to 1) a tandem Meyer–Schuster rearrangement/reduction to access enantioenriched allylic alcohols and 2) the enantioselectivereduction of imines.
描述了手性非外消旋 Re V - oxo 配合物在前手性酮的对映选择性还原中的开发和应用。除了前手性酮的对映选择性还原外,我们还报告了这些复合物在以下方面的应用:1)串联 Meyer-Schuster 重排/还原以获取对映体富集的烯丙醇和 2)亚胺的对映选择性还原。
Catalytic Asymmetric Homologation of 4‐Substituted Cyclohexanones with CF
<sub>3</sub>
CHN
<sub>2</sub>
: Enantioselective Synthesis of α
<i>‐</i>
Trifluoromethyl Cycloheptanones
作者:Shu‐Sen Li、Shuo Sun、Jianbo Wang
DOI:10.1002/anie.202115098
日期:2022.2
reaction of cyclic ketones with CF3CHN2 as the trifluoromethylation reagent. This reaction could be applied to construct silicon-stereogenic centers with moderate diastereoselectivities and high enantioselectivities.
Enantioselective Decarboxylative Arylation of α-Amino Acids via the Merger of Photoredox and Nickel Catalysis
作者:Zhiwei Zuo、Huan Cong、Wei Li、Junwon Choi、Gregory C. Fu、David W. C. MacMillan
DOI:10.1021/jacs.5b13211
日期:2016.2.17
An asymmetric decarboxylative Csp(3)-Csp(2) cross-coupling has been achieved via the synergistic merger of photoredox and nickel catalysis. This mild, operationally simple protocol transforms a wide variety of naturally abundant α-amino acids and readily available aryl halides into valuable chiral benzylic amines in high enantiomeric excess, thereby producing motifs found in pharmacologically active