Trapping of reactive intermediates from phosphites and dimethyl acetylenedicarboxylate. Diversion of reaction pathway towards stable phosphole derivatives
- 1 January 1981
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 9,p. 420-421
- https://doi.org/10.1039/c39810000420
Abstract
Trialkyl phosphites and dimethyl acetylene-dicarboxylate react at –50 °C to give the cyclopropenyl-methylene trialkoxyphosphonium ylid (1), which at –10 °C cyclises to the novel five-co-ordinate phosphorane (2); at 20 °C the phosphorane (2) rearranges to the cyclic ylide (3), whilst hydrogen bromide gas at –10 °C converts the phosphorane (2) into a stable phosphole derivative (4).Keywords
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