Direct indium-promoted preparation of α-methylene-γ-lactones from 2-(bromomethyl)acrylic acid and carbonyl compounds
作者:Prabir K Choudhury、Francisco Foubelo、Miguel Yus
DOI:10.1016/s0040-4020(99)00593-1
日期:1999.8
The reaction of 2-(bromomethyl)acrylic acid (2) with different carbonyl compounds 1 [CH2O, , c-C6H11CHO, Ph2CHCHO, (CH2)5CO, furfural, 1,4-cyclohexanedione, 2-chlorocyclohexanone, 2-hydroxybenzaldehyde, phthaldehyde, N-Boc-3-indolecarboxaldehyde, cholestanone, (1R)-(−)-myrtenal] and indium powder in a 1:1 THF:H2O mixture at room temperature affords, after acidic work-up with 6M hydrochloric acid, the
2-(溴甲基)丙烯酸(2)与不同的羰基化合物1 [CH 2 O ,,c -C 6 H 11 CHO,Ph 2 CHCHO,(CH 2)5 CO,糠醛,1,4-环己二酮的反应室温下,在1:1 THF:H 2 O混合物中,苯甲酸,2-氯环己酮,2-羟基苯甲醛,邻苯二甲醛,N -Boc-3-吲哚甲醛,胆甾烷酮,(1 R)-(-)-myrtenal]和铟粉得到,用6M盐酸进行酸性处理后,得到相应的α-亚甲基-γ-内酯3。