Reaction of Organoboranes with Lithium Aldimines. A New Procedure for the Synthesis of Unsymmetrical Ketones
作者:Yoshinori Yamamoto、Kaoru Kondo、Ichiro Moritani
DOI:10.1246/bcsj.48.3682
日期:1975.12
via the reaction of dialkylchloroboranes with lithium aldimines followed by treatment with (i) thioglycolic acid and (ii) H2O2–NaOH. The reaction permits the introduction of both primary and secondary alkyl groups into R and R′ substituents of ketones (RR′C=O), and can even be extended to the accommodation of a functional group. The reaction of B-n-hexyl-9-borabicyclo[3.3.1]-nonane with lithium aldimine
通过二烷基氯硼烷与醛亚胺锂反应,然后用 (i) 巯基乙酸和 (ii) H2O2-NaOH 处理,以良好的收率获得不对称酮。该反应允许将伯烷基和仲烷基引入酮的 R 和 R' 取代基 (RR'C=O),甚至可以扩展到容纳官能团。Bn-hexyl-9-borabicyclo[3.3.1]-nonane 与衍生自正丁基锂的醛亚胺锂的反应,在用 H2O2-NaOH 处理后也会得到不对称的酮,5-十一酮。