Oxazolo[5,4-b]pyridines 4 are synthesized by heating the iminophosphoranes 1 and alkylideneoxazol-5(4H)-ones 2. At room temperature the reaction of 4-ethoxymethyleneoxazol-5(4H)-one 2f with iminophosphorane 1a yields the enamino lactone 6, which is, in turn, transformed by heating in acetic acid into the 2(1H)-pyridone 7.
Homami, Seyed-Saied; Mukerjee, Arya K, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1992, vol. 31, # 7, p. 411 - 414
作者:Homami, Seyed-Saied、Mukerjee, Arya K
DOI:——
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TSUGE, OTOHIKO;NOGUCHI, MICHIHIKO, HETEROCYCLES, 1981, 16, N 12, 2149-2154
作者:TSUGE, OTOHIKO、NOGUCHI, MICHIHIKO
DOI:——
日期:——
Lur'e; Rawdel', Sb. Statei Obshch. Khim., 1953, p. 498,502
作者:Lur'e、Rawdel'
DOI:——
日期:——
Bell, R. A.; Faggiani, R.; Lock, C. J. L., Canadian Journal of Chemistry, 1985, vol. 63, p. 3618 - 3630
作者:Bell, R. A.、Faggiani, R.、Lock, C. J. L.、McLeod, R. A.