U. Urleb, B. Stanovnik, M. Tislér
Feb 1, 1990
Citations
0
Influential Citations
20
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
2-Ethoxycarbonyl-3-isothiocyanatopyridine (2), prepared from 3-amino-2-ethoxycarbonylpyridine (1) by the thiophosgene method, was converted with nucleophiles into pyrido[3,2-d]pyrimidine derivatives 6-11 and 25-30 either directly, or through thiourethane 3. Tricyclic systems 18 and 19 were obtained from 3, and tricyclic systems 12-17 from pyrido[3,2-d]pyrimidine derivative 11. Pyrrole reacted with 2 at C 2 , to give 20, and by further cyclization 21 and 22.