A novel and efficient synthesis of 13-methylprotoberberine alkaloids

M Hanaoka, S Yoshida, C Mukai

Index: Hanaoka, Miyoji; Yoshida, Shuji; Mukai, Chisato Journal of the Chemical Society, Chemical Communications, 1985 , # 18 p. 1257 - 1258

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Abstract

A Novel and Efficient Synthesis of 13-Methylprotoberberine Alkaloids ... Miyoji Hanaoka," Shuji Yoshida, and Chisato Mukai Faculty of Pharmaceutical Sciences, Kanazawa University, Takara-machi, Kanazawa 920, Japan ... 13-Methylberberine (6a), dehydrocorydaline (6b), and corysamine (6c), and their tetrahydro derivatives (9a-c) were efficiently synthesised from the corresponding protoberberines (1) through photochemical electrocyclic reaction of 13- ...