Selectivite de la reduction d'α-enones polycycliques par les borohydrures: effet de l'addition de tetramethyl-ethylenediamine au borohydrure de tetrabutylammonium
作者:E. D'Incan、A. Loupy、A. Maia、I. Seyden-Penne、P. Viout
DOI:10.1016/0040-4020(82)85020-5
日期:1982.1
tetramethylethylenediamine (TMEDA), in THF and in toluene. With TMEDA, the first step of the reduction is the regioselective 1,4 attack by BH−4 which leads either to the saturated ketones or to the corresponding saturated alcohols. The results observed under different conditions were interpreted by the intervention of various reductive species: diborane, enoxyborohydrides in the absence of TMEDA, amine-borane in
• NBu 4 BH 4还原了1,9 octalone,‡ 1,9 -10-methyl octalone和睾丸激素。单独或在四甲基乙二胺(TMEDA)存在下,在THF和甲苯中使用。对于TMEDA,还原的第一步是由BH - 4进行的区域选择性1,4进攻,这可能导致饱和酮或相应的饱和醇。在不同条件下观察到的结果可以通过多种还原性物质的干预来解释:乙硼烷,在没有TMEDA的情况下的环氧烷硼化物,在其存在下的胺-硼烷。