1: 1) DMF, 120 deg C 2) water, stand overnight
2: 70 percent / 9 h / 90 - 95 °C / acetic acid was stripped by destilation during the reaction
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参考文献
Klemm, L.H.; Lu, Jennifer J.; Greene, Diana S.; Boisvert, William
Journal of Heterocyclic Chemistry, 1987 , vol. 24, p. 1467 - 1472
