期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 70, 期 25, 页码 10474-10481出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo051826s
关键词
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The metathesis reaction is used as a key step for the synthesis of the indolo [2,3-a]carbazole core of rebeccamycin 13 and the sulfur analog of furostifoline 21. Using the same methodology for the attempted synthesis of furostifoline, we unexpectedly formed tert-butyl-2a-methyl-1,2,2a,10c-tetrahydro-6H-cyclobuta[c]furo[3,2-a]carbazole-6-carboxylate 26 from the unstable diene, tert-butyl 2-(2-isopropenyl-3-furyl)-3-vinyl-1H-indole-1-carboxylate 25, presumably via a spontaneous pi(8) electrocyclization reaction.
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