The preparation of α-cyanoenamines 4 via the condensation of casrbonyl compounds 2 with α-(N-methylanilino)-acetonitrile (1) carried out in the presence of a mixture of powdered potassium hydroxide and potassium carbonate and tetra-n-butylammonium bromide as a catalyst (solid-liquid catalytic two-phase system) is described. This reaction comprises a useful one-carbon chain lengthening of carbonyl compounds.
在粉状
氢氧化钾、
碳酸钾和四正丁基
铵的混合物存在下,通过 casrbonyl 化合物 2 与 α-(
N-甲基苯胺基)-
乙腈 (1) 的缩合制备 α-
氰烯胺 4描述了
溴化物作为催化剂(固液催化两相体系)。该反应包括有用的羰基化合物的一碳链延长。