Alka1oids of Corydalis incisa PERS. II. The Structure of Corydalic Acid Methyl Ester<SUP>2)</SUP>
作者:GENICHIRO NONAKA、YOSHIKO KODERA、ITSUO NISHIOKA
DOI:10.1248/cpb.21.1020
日期:——
The structure (I) of a new alkaloid, corydalic acid methyl ester, mp 140-141°, [α]D+85.4°, C22H23O6N, isolated from Corydalis incisa PERS. (Papaveraceae) only in the vegetative stage, was established by the spectroscopic studies and chemical correlation with mesotetrahydrocorysamine. Furthermore, on the basis of the stereochemical investigation of mesotetrahydrocorysamine, the stereostructure of corydalic acid methyl ester was determined as XII. Corydalic acid methyl ester is a noteworthy natural alkaloid in which aromatic ring is attached to the position-3 of the tetrahydroisoquinoline, and biogenetically it is supposed to be derived from protoberberine skeleton by a fission of B-ring, possibly through an aldehyde-type intermediate.
从 Corydalis incisa PERS.(罂粟科)中分离出一种新生物碱,堇菜酸甲酯,mp 140-141°,[α]D+85.4°,C22H23O6N。(通过光谱研究和与中四氢堇菜胺的化学相关性,确定了该物质是从 Corydalis incisa PERS.此外,在对中四氢紫堇胺进行立体化学研究的基础上,确定了堇菜酸甲酯的立体结构为 XII。堇菜酸甲酯是一种值得注意的天然生物碱,它的芳香环连接在四氢异喹啉的第 3 位上,从生物遗传学的角度看,它可能是通过 B 环的裂变从原小檗碱骨架中衍生出来的,也可能是通过醛类中间体衍生出来的。