Heterocycles p. 621 - 628 (2000)
Update date:2022-09-26
Topics:
Al-Thebeiti, Marzoog S.
3-Methylpyrazolin-5-ones (1a,b) were reacted with cycloalkanones (2a-d) in the presence of fused sodium acetate to give the corresponding cycloalkylidene derivatives (3a-h). Reaction of compounds (3a-h) with malononitrile gave the pyrano derivatives (4a-h), which were cyclized to pyranopyrimidines with acetic anhydride/pyridine, formamide and formamide/formic acid.
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Doi:10.1002/ardp.19703030205
(1970)Doi:10.1007/BF00475846
()Doi:10.1021/acs.jafc.5b04028
(2015)Doi:10.1021/ol005547x
(2000)Doi:10.1016/S0022-328X(00)83076-4
(1970)Doi:10.1016/S0968-0896(99)00289-8
(2000)