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.