Patent ID: 6211395
Filing Date: 2001-04-03
Classification: C07D

Abstract:
An intermediate compound selected from the group consisting of:(R) Ethyl 4-(N-benzyloxycarbonyl)amino-3-methanesulfonyloxy-2-(spirocyclopropyl)-but yrate;(S) Ethyl 4-(N-benzyloxycarbonyl)amino-3-methanesulfonyloxy-2-(spirocyclopropyl)-but yrate;(R) Ethyl 4-(N-fluoroenylmethoxycarbonyl)amino-3-methanesulfonyloxy-2-(spirocyclopro pyl)-butyrate;(S) Ethyl 4-(N-fluoroenylmethoxycarbonyl)amino-3-methanesulfonyloxy-2-(spirocyclopro pyl)-butyrate;(R) Ethyl 4-(N-tert-butoxycarbonyl)amino-3-methanesulfonyloxy-2-(spirocyclopropyl)-b utyrate; and(S) Ethyl 4-(N-tert-butoxycarbonyl)amino-3-methanesulfonyloxy-2-(spirocyclopropyl)-b utyrate.