作者:Sean M. Smith、Nathan C. Thacker、James M. Takacs
DOI:10.1021/ja710492q
日期:2008.3.1
(>95%) and enantioselective (93-99% ee) rhodium-catalyzedhydroboration with pinacolborane (PinBH) using simple chiral monophosphite or phosphoramidite ligands in combination with Rh(nbd)2BF4. The most effective ligands identified are phosphoramidite 4, derived from BINOL and N-methylaniline, and phosphite 5c, prepared from the (4'-tert-butyl)phenyl TADDOL analogue and phenol. For example, (E)-3-hexenoic
Access to Enantioenriched 1,<i>n</i>-Diamines via Ni-Catalyzed Hydroamination of Unactivated Alkenes with Weakly Coordinating Groups
作者:Peng-Fei Yang、Jian-Xing Liang、Han-Tong Zhao、Wei Shu
DOI:10.1021/acscatal.2c02892
日期:2022.8.5
chiral α-branched aliphatic amine motifs are important substructures in bioactive compounds and related molecules and serve as privileged chiral ligands in both organo- and transition-metal-catalysis. However, direct access to such structural motifs remains a formidable challenge. Herein, a straightforward method to access 1,n-diamines (n = 2, 3, 4) containing a chiral α-branched aliphatic amine is achieved
Nickel-Catalyzed Regio- and Enantioselective Hydroamination of Unactivated Alkenes Using Carbonyl Directing Groups
作者:Changseok Lee、Hyung-Joon Kang、Huiyeong Seo、Sungwoo Hong
DOI:10.1021/jacs.2c02343
日期:2022.5.25
addition of an N–H bond to various alkenes via a direct catalytic method is a powerful way of synthesizing value-added chiral amines. Therefore, the enantio- and regioselective hydroamination of unactivatedalkenes remains an appealing goal. Here, we report the highly enantio- and regioselective Ni-catalyzed hydroamination of readily available unactivatedalkenes bearing weakly coordinating native
Access to dialkylated allylic stereogenic centers by Ni-catalysed enantioselective hydrovinylation of unactivated alkenes
作者:Jian-Xin Zhang、Peng-Fei Yang、Wei Shu
DOI:10.1039/d2sc04350e
日期:——
Herein, a general protocol to construct tertiary allylic stereogenic centers with two alkyl substituents enabled by Ni-catalysed regio- and enantioselective hydrovinylation of unactivated aliphatic alkenes with vinyl halides has been developed.