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A new class of carbohydrate analogues, benzo-fused heterobicycles 1, can be prepared by cyclization of D-glucals with aryl amines in the presence of 10 mol % indium tribromide under mild and convenient reaction conditions Eq. (1). The structure and configuration of the products were established by extensive NMR experiments and molecular modeling studies.
Yadav et al. (Thu,) studied this question.