Enantioselective carbanion cyclization of 5-alkenyl carbamates induced by asymmetric lithiation with s-butyllithium/(−)-sparteine system
摘要:
Treatment of (E)-6-phenyl-5-hexenyl carbamates with s-BuLi /(-)-sparteine is shown to afford the trans-1,2-disubstituted cyclopentane derivatives in high % ee, along with the bicyclo[3.1.0]hexanes (bicyclization products). (C) 1998 Elsevier Science Ltd. All rights reserved.
Enantioselective carbanion cyclization of 5-alkenyl carbamates induced by asymmetric lithiation with s-butyllithium/(−)-sparteine system
摘要:
Treatment of (E)-6-phenyl-5-hexenyl carbamates with s-BuLi /(-)-sparteine is shown to afford the trans-1,2-disubstituted cyclopentane derivatives in high % ee, along with the bicyclo[3.1.0]hexanes (bicyclization products). (C) 1998 Elsevier Science Ltd. All rights reserved.