Formation of α-dialkylamino alkyllithium intermediates in the reaction of N,N-dialkylamides with PhMe2SiLi followed by a second lithium reagent, and their alkylation, fragmentation, cyclisation and rearrangement by proton transfer
作者:Ian Fleming、Stephen R. Mack、Ian Fleming、Stephen R. Mack、Barry P. Clark
DOI:10.1039/a800651b
日期:——
Tertiary amides (RCONMe2) react with PhMe2SiLi, followed by a second lithium reagent NuLi, to give α-dialkylamino alkyllithium intermediates R(Me2N)CLiNu that undergo protonation 2 â 3, alkylation 2a â 3ab, β-elimination 5 â 6, intramolecular attack on an isolated double bond 9 â 10, intramolecular proton transfer 12, 17 and 22 (arrows), and fragmentation 28 and 34 (arrows), depending upon the structures of the various components R and Nu.
叔酰胺(RCONMe2)与 PhMe2SiLi 反应,然后与第二种锂试剂 NuLi 反应,得到 δ-二烷基氨基烷基锂中间体 R(Me2N)CLiNu,中间体 R(Me2N)CLiNu 经历了质子化 2 - 3、烷基化 2a - 3ab、δ-消除 5 - 6、10 分子内质子转移 12、17 和 22(箭头),以及碎裂 28 和 34(箭头),具体取决于 R 和 Nu 各组分的结构。