Cobalt-Catalysed Addition of Allylidene Dipivalate to Aldehydes. A Formal Homoaldol Condensation
作者:Marco Lombardo、Sebastiano Licciulli、Filippo Pasi、Gaetano Angelici、Claudio Trombini
DOI:10.1002/adsc.200505212
日期:2005.12
A Co(I)-catalysed condensation of allylidene dipivalate with aldehydes to give (Z)-4-hydroxybut-1-enyl pivalates in 62 to 87% isolated yields, is reported. Reactions are run in acetonitrile at 0 or 25 °C depending on the nature of the aldehyde, and exploiting the Co(II)/Zn(0) redox couple for the preparation of the catalytic Co(I) species.
报道了Co(I)催化的二烯丙基亚丙基新戊酸酯与醛的缩合,以62至87%的分离产率得到(Z)-4-羟基丁-1-烯基新戊酸酯。根据醛的性质,反应在乙腈中于0或25°C进行,并利用Co(II)/ Zn(0)氧化还原对制备催化Co(I)物质。