作者:R. ROBINSON、A. M. STEPHEN
DOI:10.1038/162177a0
日期:1948.7
AN outstanding result of Wielandâs long series of investigations of vomicine was the degradation of the alkaloid to a base, C15H16N2, termed vomipyrine1. This afforded yellow salts, and the spectrochemical behaviour clearly indicated its constitution as an alkylated pyrroquinoline, C11H7N2.C4H9, although the position of fusion of the rings and the position and distribution of the alkyl group or groups (2Et, Me, Pr, Bu, etc.) was unknown. Guesses based on the earlier strychnine formulæ were disproved by synthesis2.
Wieland对呕吐碱系列长期研究的一个显著成果是将这种生物碱降解为一种基础物质,称为呕吐吡啶(C15H16N2)。这产生了黄色盐,光谱化学行为清晰地表明其结构为一种烷基化的吡咯喹啉(C11H7N2.C4H9),尽管环的熔融位置以及烷基团或多烷基团(如2乙基、甲基、丙基、丁基等)的具体位置和分布尚不明确。基于早期士的啶结构的猜测已通过合成被证伪。