Journal
ORGANIC LETTERS
Volume 13, Issue 3, Pages 502-505Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol102848w
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- NIH [CA 53604]
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Total synthesis of (+)-isatisine A Is described based on the application of a silyl-directed Mukaiyama-type [3 + 2]-annulation for the preparation of a fully substituted furan core. The indole branch forming the quaternary carbon center at C2 was constructed by addition to an intermediate N-acyliminium ion derived from aminal 4. In addition, the fused tetracyclic framework Including furan core was built up using modified Buchwald amidation conditions.
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