A general route to α-alkyl (E)-α,β-unsaturated aldehydes
作者:Nour Lahmar、Jamaa Aatar、Taïcir Ben Ayed、Hassen Amri、Moncef Bellassoued
DOI:10.1016/j.jorganchem.2006.03.015
日期:2006.6
Bis(trimethylsilyl)-tert-butylaldimines 3 react with aldehydes in the presence of zinc bromide at room temperature to give, after hydrolysis, the desired α-alkyl α,β-ethylenic aldehydes in good yield and with very high Estereoselectivity. The reaction was believed to proceed via the α-silyl β-siloxyimines 4.
Synthesis of alkyl (α-phenylthioalkenyl) ketones containing a (Z)-trisubstituted olefinic fragment
作者:N. Ya. Grigorieva、P. G. Tsiklauri
DOI:10.1023/b:rucb.0000035654.60768.fb
日期:2004.3
Warren's method, which has been proposed for the synthesis of alpha-phenylthiodialkyl ketones, appeared to be inefficient for the preparation of their alkenyl alkyl analogs. The latter were prepared in good yields by alkenylation of alkyl phenylthiomethyl ketones with alkenyl bromides.
De Kimpe,N. et al., Synthetic Communications, 1975, vol. 5, p. 269 - 274