6-Exo cyclizations of 2-indolylacyl radicals: access to the uleine alkaloid skeleton.

[摘要]：A new straightforward approach to the bridged framework (e.g. I) of uleine alkaloids, based on the 6-exo cyclization of selenoester-derived 3-(tetrahydropyridin-2-yl)indoline-2-carbonyl radicals under reductive conditions, is described.

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