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Paper | Regular issue | Vol 32, No. 9, 1991, pp.1737-1744
Published online, 1st January, 1970
DOI: 10.3987/COM-91-5770
Synthesis of (Z)-3-Butylidene-6,7-dihydroxyphthalide

Yoshimitsu Ogawa,* Kunio Hosaka, Masao Chin (Chen Zhengxiong), and Horoshi Mitsuhashi

*Research Institute for Biology and Chemistry, Tsumura & Co., 3586 Yoshiwara, Ami-machi, Inashiki-gun, Ibaraki 300-1192, Japan


(Z)-3-Butylidene-6,7-dihydroxyphthalide (2) was first synthesized from 6,7-dimethoxyphthalide (4) and its structure was synthetically confirmed.