Synthesis of cis,cis,cis-tetrasubstituted cyclobutanes. Trapping of tetrahedral intermediates in intramolecular nucleophilic addition.
J Org Chem 2000;
65:6418-22. [PMID:
11052083 DOI:
10.1021/jo000361x]
[Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The intramolecular [2 + 2] photocycloaddition of bismaleimides leads to cage diimides 2. Nucleophilic addition on these compounds (NaBH4, RLi, or MeONa) gives rise to various diazatetracyclic 4 and 11 or oxadiazapentacyclic 3 "bowl shaped" alcohols. X-ray analyses of 3c and 11a provide definite structural data concerning these two highly functionalized compounds.
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