反应条件
1: With lithium diisopropyl amide in tetrahydrofuran; hydrogenchloride; diethyl ether; 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran T=-72 - -68°C; 2.66 h; 2: With carbon dioxide in tetrahydrofuran; diethyl ether 3: With hydrogenchloride in tetrahydrofuran; diethyl ether; water pH=1 - 2;
参考文献
Hendrix, James A.; Strupczewski, Joseph T.; Bordeau, Kenneth J.; Brooks, Sarah; Hemmerle, Horst; Urmann, Matthias; Zhao, Xu-Yang; Mueller, Paul J.
Patent: US2003/229066 A1, 2003 ;
Location in patent: Page 45 ;
US 20030229066 A1
