Total syntheses of phycocyanobilin and its photoactivatable derivative were accomplished by developing a new and versatile method for the construction of A,B-rings component, which consists of the Wittig-type new coupling reaction of 4-(1-methoxyethyl)-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 subsequent acid treatment.
该方法包括 4-(1-甲氧基乙基)-3-甲基-5-对
甲苯磺酰基-1,5-二氢-
2H-吡咯-2-酮和 2-甲酰基
吡咯衍
生物在 nBu3P 和碱存在下的 Wittig 型新偶联反应,然后用铝
汞齐还原并进行酸处理。