The first generation and stereospecific alkylation of alpha-trifluoromethyl oxiranyl anion.
[reaction: see text] Generation and reactions of oxiranyl anion 2 stabilized by a trifluoromethyl group are described. Treatment of (S)-2,3-epoxy-1,1,1-trifluoropropane (75% ee) with n-BuLi followed by electrophiles gave corresponding 2-alkylated epoxide 3 with retention of stereochemistry in moderate to good yields. The reaction is applicable for a general synthesis of optically active trifluoromethylated tertiary alcohols.
Yamauchi
Yoshihiro
Y
Department of Applied Chemistry, Faculty of Engineering, Okayama University, Tsushimanaka 3-1-1, Okayama 700-8530, Japan.
Katagiri
Toshimasa
T
Uneyama
Kenji
K