Vinylphosphonium salt mediated simple synthesis of 7-oxo-7H-pyrido [1, 2, 3-cd] perimidine derivatives. Dynamic NMR spectroscopic study of prototropic tautomerism …
I Yavari, M Adib, F Jahani-Moghaddam, HR Bijanzadeh
文献索引：Yavari, Issa; Adib, Mehdi; Jahani-Moghaddam, Fatemeh; Bijanzadeh, Hamid R Tetrahedron, 2002 , vol. 58, # 34 p. 6901 - 6906
The reactive 1: 1 intermediate produced in the reaction between dimethyl acetylenedicarboxylate and triphenylphosphine was trapped by ethyl 1H-perimidine-2- carboxylate to yield 5-ethyl 9-methyl 7-oxo-7H-pyrido [1, 2, 3-cd] perimidine-5, 9- dicarboxylate and 5-ethyl 9-methyl 1-[3-methoxy-1-(methoxycarbonyl)-3-oxo-1-propenyl]-7- oxo-7H-pyrido [1, 2, 3-cd] perimidine-5, 9-dicarboxylate in nearly 7: 1 ratio and overall ...
