Ingle; Mann
Journal of the Chemical Society, 1895 , vol. 67, p. 610
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Biltz
Justus Liebigs Annalen der Chemie, 1899 , vol. 305, p. 171
1: With sodium ethanolate in di-isopropyl ether
T=60°C;
2: With sulfuric acid in water
Heating / reflux;
3: With hydrazine in ethanol
T=0°C; Heating / reflux;
参考文献
TAKEDA CHEMICAL INDUSTRIES, LTD.
Patent: WO2003/99793 A1, 2003 ;
Location in patent: Page 271 ;