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 lithiumaldimines 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 -NaOH 处理后也会得到不对称的酮,5-十一酮。
Taguchi, Kazuhiko; Nakagawa, Hideto; Hirabayashi, Tomotaka, Journal of the American Chemical Society, 2004, vol. 126, # 1, p. 72 - 73