A concise and effective approach to dicarboxamide functionalized novel pyrazolo[1,5-a]pyrimidine has been developed. The method involves [3?+?3] hetroaromatization of oxoketene dithioacetals (16a–x) with 5-amino-N-cyclohexyl-3-(methylthio)-1H-pyrazole-4-c
Patel, Anilkumar S.,Kapuriya, Naval P.,Naliapara, Yogesh T.
supporting information
p. 2635 - 2643
(2017/09/26)
Thermal cyclization of ketene dithioacetals: A convenient synthetic route to substituted 2(1H)-quinolinones and 2(1H)-pyridones
Acyl(arylcarbamoyl)ketene dithioacetals 2 and acyl(1-alkenylcarbamoyl)ketene dithioacetals 5 obtained from the corresponding β-oxo amides 1,4 were thermally cyclized to give various 3-acyl-4-alkylthio-2(1H)-quinolinones 3, and 3-acyl-4-alkylthio-5-aryl-2(
Pak,Choi
p. 1291 - 1294
(2007/10/02)
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