An Efficient Synthesis of Symmetric Bilindiones. Mesobilirubin-Xlllα and Analogs with Varying Alkanoic Acid Chain Lengths
作者:David P. Shrout、Gisbert Puzicha、David A. Lightner
DOI:10.1055/s-1992-26102
日期:——
An inexpensive gram-scale, three-step procedure is described to convert methyl xanthobilirubinate and it alkanoic acid ester analogs (methyl 5-[(3-ethyl-1, 5-dihydro-4-methyl-5-oxo-2H-pyrrol-2-ylidene)methyl]-1, 4-dimethylpyrrol-3-ethanoate, -propanoate, -butanoate, -pentanoate, -hexanoate) into mesobilirubin-XIIIα and analogs in > 90% yield at each step.
本文介绍了一种成本低廉的克级三步法,可将黄原胆红素甲酯及其烷酸酯类似物(5-[(3-乙基-1, 5-二氢-4-甲基-5-氧代-2H-吡咯-2-亚基)甲基]-1, 4-二甲基吡咯-3-乙酸酯、-丙酸酯、-丁酸酯、-戊酸酯、-己酸酯)转化为中黄原胆红素-XIIIδ和类似物,每一步的收率均大于 90%。