Methyl 3-(triphenylphosphoranylideneamino) pyrazine-2-carboxylate: synthesis, crystal structure and use in pteridin-4 (3H) ones synthesis

T Okawa, S Eguchi, A Kakehi

文献索引：Okawa, Tomohiro; Eguchi, Shoji; Kakehi, Akikazu Journal of the Chemical Society - Perkin Transactions 1, 1996 , # 3 p. 247 - 254

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摘要

The title iminophosphorane 6 has been prepared from methyl 3-aminopyrazine-2- carboxylate 1 by a modified Kirsanov method using a triphenylphosphine– hexachloroethane–triethylamine system. The crystal structure of 6 illustrated an iminophosphorane function (NP bond). 2, 3-Disubstituted pteridin-4 (3H)-ones were obtained in a one-pot reaction of 6 with isocyanates, followed by heterocyclization on ...