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The Preparation of Mono-, 1,1-Di- and Trisubstituted Ethylenes by Benzotriazole Methodology

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Katritzky, A. R.; Toader, D.

Editorial: Synlett, 4, p.458-466, 2001.

Rezumat:

A review with >30 refs. is given. Mono- and 1,1-disubstituted ethylenes are available by vicinal elimination of benzotriazolyl and trimethylsilyl groups from readily available intermediates of type BtRR1CCH2SiMe3 (Bt = benzotriazol-1-yl). Low-valent Ti compds. cause vicinal elimination of benzotriazolyl and hydroxyl groups from both diastereoisomers of RBtCHCHROH compds. to give styrenes and dienes with high trans-stereoselectivity. The starting materials are easily obtained from Bt-stabilized carbanions and aldehydes.

Cuvinte cheie: organic chemistry