Enantioselective alkylation at the α-position of cyclic ketones using a chiral lithium amide as a base in the presence of lithium bromide
作者:Masatoshi Murakata、Makoto Nakajima、Kenji Koga
DOI:10.1039/c39900001657
日期:——
An efficient enantioselectivealkylation reaction at the α-position of cyclicketones (1, 2) can be realized in up to 92% enantiometric excess (e.e.) by first forming their lithium enolates using a chirallithiumamide 4 in the presence of lithiumbromide, followed by treatment with alkyl halides.