Abstract
Diphenyl 3-methyl-penta-1,2,4-trienyl phosphine oxide can be readily prepared via an atom-economical [2,3]-sigmatropic rearrangement of the mediated alkenynyl phosphinite formed in situ by reaction of 3-methylpent-1-en-4-yn-3-ol with diphenylchlorophosphine. Electrophilic cyclization reactions of the vinylallenyl phosphine oxide prepared were investigated as it was established that the reactions proceeded with formation of various heterocyclic or highly unsaturated compounds with participation of the allenic and/or 1,3-dienic part of the vinylallenic system with neighboring group participation of phosphoryl and/or vinylic group. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications® to view the free supplemental file.
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