摘要
A highly efficient preparative procedure for ( R,S ) and ( S,S ) pyrrolidine 2 carboxylic acid 3,5 dioxa 4 boracyclohepta[2,1 a ;3,4 a ′]dinaphthalen 4 yl esters [namely ( R,S ) BNBAP and ( S,S ) BNBAP] is described and the crystal structure of ( R,S ) BNBAP was obtained. The data indicate that ( R,S ) BNBAP is a spirocyclic inner borate salt with almost normal tetrahedral configuration. This structural form may be the basic reason for their high chemical, optical and thermodynamic stability.
A highly efficient preparative procedure for ( R,S ) and ( S,S ) pyrrolidine 2 carboxylic acid 3,5 dioxa 4 boracyclohepta[2,1 a ;3,4 a ′]dinaphthalen 4 yl esters [namely ( R,S ) BNBAP and ( S,S ) BNBAP] is described and the crystal structure of ( R,S ) BNBAP was obtained. The data indicate that ( R,S ) BNBAP is a spirocyclic inner borate salt with almost normal tetrahedral configuration. This structural form may be the basic reason for their high chemical, optical and thermodynamic stability.
基金
ProjectsupportedbytheNationalNaturalScienceFoundationofChina (No .29972033)andtheKeyScienceResearchFoundationofHubeiProvince (No .98IP13 0 5 )
