Issue 10, 1978

Vinyl carbanions. Part 4. Use of vinyl carbanions derived from ββ-diphenylacrylonitrile as nucleophiles

Abstract

Vinyl carbanions of the type Ph2C[double bond, length half m-dash][C with combining macron]·CN (1a) were formed by treating ββ-diphenylacrylonitrile (1) with BuLi in tetrahydrofuran, at –78 °C. These vinyl carbanions were applied as nucleophiles in addition and SN-type reactions with the following electrophiles: ββ-diphenylacrylonitrile, benzophenone, trans-α-cyanostilbene, carbon dioxide, and alkyl iodides. The addition of (1a) to (1) took place at C(α) and afforded the addition product 1,1,4,4-tetraphenyl-2,3-dicyanobut-1-ene, and the addition–elimination products 1,1,4,4-tetraphenyl-2-cyanobutadiene and 1,1,4,4-tetraphenyl-2-butyl-3-cyanobut-1-ene. With trans-α-cyanostilbene, the Michael addition product was formed. A common by-product in all reactions was 1,1-diphenylhex-1-ene.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 1, 1978, 1232-1236

Vinyl carbanions. Part 4. Use of vinyl carbanions derived from ββ-diphenylacrylonitrile as nucleophiles

U. Melamed and B. A. Feit, J. Chem. Soc., Perkin Trans. 1, 1978, 1232 DOI: 10.1039/P19780001232

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