A practical synthesis of 3(S)-methyl-heptanoic acid from (S)-citronellol
摘要:
Chiral 3-methyl-heptanoic acid is readily accessible by functional group manipulation of optically active citronellol. In principle, this approach is general and could be applied to the synthesis of chiral 3-methyl-alkanoic acids seven carbon atoms in length and longer.
Iridium-Catalyzed Branch-Selective and Enantioselective Hydroalkenylation of α-Olefins through C–H Cleavage of Enamides
作者:Xin Sun、En-Ze Lin、Bi-Jie Li
DOI:10.1021/jacs.2c07477
日期:2022.9.28
transformation in asymmetric catalysis. Herein we report an iridium-catalyzedasymmetric hydroalkenylation of α-olefins through directed C–H cleavage of enamides. This atom-economical addition process is highly branch-selective and enantioselective, delivering trisubstituted alkenes with an allylic stereocenter. DFT calculations reveal the origin of regio- and enantioselectivity.