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.
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Yadav et al. (2003) studied this question.
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