Pyrrolo[2,3-d]pyrimidine synthesis through activation of N-benzyl groups by distal amides
作者:Laurent El Kaïm、Laurence Grimaud、Simon Wagschal
DOI:10.1039/c3ob41477a
日期:——
A new activation mode of CH2–benzylamino groups has been observed during the preparation of pyrrolopyrimidines from Ugi–Smiles adducts of hydroxypyrimidines. The cyclization proceeds via a formal deprotonation of the N-benzyl group followed by trapping of the resulting anion by the alkyne moiety. The key role of the vicinal amide function during the process was pointed out.
在从羟基嘧啶的Ugi–Smiles加合物制备吡咯并嘧啶的过程中,观察到了CH2–苄氨基团的新活化模式。该环化过程通过N-苄基的形式去质子化,随后由炔部分捕获产生的阴离子来进行。过程中强调了相邻酰胺功能的关键作用。