摘要:
A method for effective regiospecific preparation of 2(A),2(B)-disulfonated gamma-cyclodextrin has been developed. Reaction of gamma-cyclodextrin with benzophenone-3,3'-disulfonyl imidazole and molecular sieves in DMF yielded 2(A), 2(B)-disulfonated gamma-cyclodextrin with no 2(A), 2(C)-, 2(A), 2(D)-, 2(A), 2(E)-, 3-, or 6-sulfonyl isomers. (C) 2000 Elsevier Science Ltd. All rights reserved.