An Efficient Method to Construct the A,B-Rings Component toward Total Syntheses of Phycocyanobilin and Its Derivative as a Photoprobe
作者:Krishanthi Padmarani Jayasundera、Hideki Kinoshita、Katsuhiko Inomata
DOI:10.1246/bcsj.73.497
日期:2000.2
Total syntheses of phycocyanobilin and its derivative bearing a photoreactive group at the D-ring were accomplished by developing a new and efficient method for the construction of A,B-rings component, which consists of the Wittig-type new coupling reaction of 4-(1-methoxyethyl or 1-tosylethyl)-3-methyl-5-tosyl-1,5-dihydro-2H-pyrrol-2-one and a 2-formyl pyrrole derivative in the presence of nBu3P and a base, followed by reduction with aluminum amalgam and a subsequent acid or base treatment.
通过开发一种新颖且高效的方法构建A、B环部分,成功完成了藻蓝蛋白胆色素及其在D环上具有光反应基团的衍生物的总合成。该方法包括在nBu3P和碱存在下,4-(1-甲氧基乙基或1-托烯乙基)-3-甲基-5-托烯-1,5-二氢-2H-吡咯烷-2-酮与2-呋喃基吡咯衍生物的Wittig型新偶联反应,随后用铝齐聚物还原,并进行酸或碱处理。