Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 11, Pages 3740-3743Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja1108694
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Funding
- National Basic Research Program of China [2009CB825300]
- National Natural Science Foundation of China [20732005, J0830413]
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An efficient method for synthesis of polysubstituted cyclobutenones, which are not readily available from traditional methods due to the intrinsic ring strain, is described. The reaction of 2,3-allenoates and organozinc reagents proceeds via a tandem Michael addition/cyclic 1,2-addition/elimination mechanism with the functional groups from the organozinc reagents being introduced to the 3-position of the cyclobutenone products regiospecifically in moderate to excellent yields. Application to the synthesis of stereodefined beta,gamma-unsaturated enones is demonstrated.
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