Regiocontrolled Reductive Vinylation of Aliphatic 1,3-Dienes with Vinyl Triflates by Nickel Catalysis
作者:Xiaobo Pang、Zhen-Zhen Zhao、Xiao-Xue Wei、Liangliang Qi、Guang-Li Xu、Jicheng Duan、Xue-Yuan Liu、Xing-Zhong Shu
DOI:10.1021/jacs.1c00142
日期:2021.3.31
a powerful tool for divergent synthesis, yet it remains a long-standing challenge for aliphatic substrates. Herein, we report a reductive approach for a branch-selective 1,2-hydrovinylation of aliphatic 1,3-dienes with R–X electrophiles, which represents a new selectivity pattern for diene functionalization. Simple butadiene, aromatic 1,3-dienes, and highlyconjugated polyene were also tolerated. The
The first example of P,S-bidentate ligands containing both a planar chiral scaffold and a chiral sulfinamide moiety were reported.
包含平面手性支架和手性亚砜基团的P、S-双齿配体的第一个示例已经报道。
(R)- and (S)-6,6′-dimethyl- and 6,6′-dimethoxy-2,2′-diiodo-1,1′-biphenyls: Versatile intermediates for the synthesis of atropisomeric diphosphine ligands
作者:Marco Cereghetti、Wolf Arnold、Emil A. Broger、Alain Rageot
DOI:10.1016/0040-4039(96)01090-8
日期:1996.7
Starting from enantiomerically pure 6,6′-dimethyl- or 6,6′-dimethoxy-2,2′-diiodo-1,1′-biphenyls (1a or 1b) a variety of atropisomeric diphosphine ligands of defined axial chirality are directly accessible in good yields: asymmetric diphosphines of type B and the corresponding diphosphines with one (type C) or two (type D) stereogenic phosphorus atoms. Pitfalls of the lithiation/phosphination reaction