1: Methyltriphenylphosphonium bromide With potassium tert-butylate in diethyl ether 1 h; Heating / reflux; 2: thiophene-2-carbaldehyde With hydroquinone in water 1.16667 h; Heating / reflux;
参考文献
Otsuka Chemical Co., Ltd.
Patent: EP1541550 A1, 2005 ;
Location in patent: Page/Page column 8 ;