Bulletin of the Chemical Society of Japan p. 497 - 500 (2000)
Update date:2022-09-26
Topics:
Jayasundera, Krishanthi Padmarani
Kinoshita, Hideki
Inomata, Katsuhiko
Total syntheses of physocyanobilin and its derivative bearing a photoreactive group at the D-ring 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 (n)Bu3P and a base, followed by reduction with aluminum amalgam and a subsequent acid or base treatment.
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