Highly enantioselective palladium(II)-catalyzed cyclization of (Z)-4 '-acetoxy-2 '-butenyl 2-alkynoates: An efficient synthesis of optically active gamma-butyrolactones
Qh. Zhang et Xy. Lu, Highly enantioselective palladium(II)-catalyzed cyclization of (Z)-4 '-acetoxy-2 '-butenyl 2-alkynoates: An efficient synthesis of optically active gamma-butyrolactones, J AM CHEM S, 122(31), 2000, pp. 7604-7605