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 highly conjugated polyene were also tolerated. The
1,3-二烯的区域控制功能化已成为发散合成的有力工具,但它仍然是脂肪族底物的长期挑战。在此,我们报告了一种使用 R-X 亲电试剂对脂肪族 1,3-二烯进行支链选择性 1,2-氢乙烯基化的还原方法,这代表了二烯官能化的新选择性模式。简单的丁二烯、芳香族 1,3-二烯和高度共轭的多烯也可以使用。Ni(0) 和膦-腈配体的组合通常会产生 >20:1 的区域选择性,同时保留 C 3 -C 4的几何形状双键。该反应在广泛的底物范围内进行,它允许两个生物活性单元共轭形成更复杂的多烯分子,如四烯和戊烯以及庚烯。