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2-Substituted and unsubstituted benzo[b]tellurophenes (3A a-e) were synthesized in one-pot from o-bromoethynylbenzenes (2) via three steps in good yields. Similarly, benzo[b]-selenophenes (3B a-e) and -thiophenes (3C a-e) were also obtained.
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Sashida et al. (1998) studied this question.
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