Conjugated carbodiimides: Preparation and thermal cyclization to 2-aminopyridine derivatives
作者:Pedro Molina、Pilar M. Fresneda、Pascual Alarcón
DOI:10.1016/s0040-4039(00)80101-x
日期:1988.1
The aza-Wittig reaction of iminophosphorane () with isocyanates leads to conjugated carbodiimides which undergo electrocyclic ring-closure to give 2-aminopyridinederivatives.
Base-Catalyzed One-Pot Synthesis of 2,3,6-Substituted Pyridines
作者:Baofu Zhu、Jiaming He、Kai Zou、Anquan Li、Chen Zhang、Jiaji Zhao、Hua Cao
DOI:10.1021/acs.joc.3c00375
日期:2023.8.18
was established, which mainly consisted of ynals, isocyanates, amines and alcohols. This strategy provides a wide range of substrates and represents a simple process for the preparation of different pyridine derivatives in good yields with high regioselectivities.