Electro-organic reactions. part 28. preparative applications of the oxalate cathodic cleavage reaction including one-pot conversions of aldehydes and ketones
作者:Nazar-ul-Islam、David W. Sopher、James H.P. Utley
DOI:10.1016/s0040-4020(01)86879-4
日期:1987.1
ketones, a one-pot conversion of the carbonyl compounds into alkanes and alkenes has been devised. The method involves prior electrolysis to alcohol or pinacol, addition of an oxalate ester, and further electrolysis for reductive de-oxygenation. Good results are obtained for aromatic ketones and aldehydes. Several oxalate esters have been used in such reactions; diethyloxalate is the most convenient. Esters
醇和邻二醇与草酸酯共电解时,在阴极生成的碱的催化下发生酯交换反应。在温和条件下,在适度的阴极电位下,酯原位形成给出相应的烷烃和烯烃的良好收率。此外,由于可以由醛和酮以电化学方式有效地制备二醇(频哪醇)和醇,因此已经设计了将羰基化合物一锅转化为烷烃和烯烃的方法。该方法包括预先电解成醇或频哪醇,加入草酸酯,以及进一步电解以进行还原性脱氧。对于芳族酮和醛,获得了良好的结果。在这种反应中已经使用了几种草酸酯。草酸二乙酯是最方便的。方酸和草酰胺的酯进行阴极脱氧,但是在制备中使用不方便。