Abstract
A new approach to the synthesis of cyclopenta[g ]indole derivatives possessing structural features of natural alkaloids, such as trikentrins and herbindols, is described. The key step in the sequence is a thallium(III)-mediated ring-contraction reaction to transform a cyclohexene moiety into a functionalized cyclopentyl unit.
Key words
cyclopenta[g ]indoles - thallium trinitrate - ring contraction
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