Highly (E)-selective BF3·Et2O-promoted allylboration of chiral nonracemic α-Substituted allylboronates and analysis of the origin of stereocontrol
(Figure presented) δ-Methyl-substituted homoallylic alcohols 2 were prepared in 71-88% yield, E:Z >30:1 and 93% to >95% ee via BF 3·Et2O-promoted allylboration with α-Me-allylboronate 1. The origin of high (E)-selectivity is proposed
Chen, Ming,Roush, William R.
supporting information; experimental part
p. 2706 - 2709
(2010/11/18)
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