Journal of the Chemical Society. Perkin Transactions 2 (2001) p. 1157 - 1165 (1996)
Update date:2022-08-03
Topics:
Roberts, Stanley M.
Sutton, Peter W.
Wright, Lorraine
The reaction of the dienes 1-5 with diphenylketene to give the [2 + 2]-adducts 6-10 and the [4 + 2]-adducts 11-15, respectively, has been found to occur by an ionic mechanism involving the zwitterion 16. The reactions of the dienes 2 and 3 with methylphenylketene (and also cyclohexa-1,3-diene with diphenylketene) proceed in a similar fashion. The enol ether 13 was converted into the polyoxygenated cyclohexane derivatives 33, 35 and 38.
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