Rearrangement of 2-(2,5-Dioxopyrrolidin-1-yl)guanidine: An Efficient Synthesis and Structure of 3-(5-Amino-1H-1,2,4-triazol-3-yl)propanoic Acid and Derivatives
作者:Victor M. Chernyshev、Anna V. Chernysheva、Zoya A. Starikova
DOI:10.3987/com-10-12017
日期:——
The reaction between aminoguanidine and succinic acid in water under acid catalysis yields a mixture of guanyl- and digyanylhydrazides of succinic acid, which turns into a poorly separable mixture of 3-(5-amino-1H-1,2,4-triazol-3-yl)propanoic acid (3) and 3,3'-(ethane-1,2-diyl)bis(1H-1,2,4-triazol-5-amine) (5) in basic media. The fusion of aminoguanidine hydrochloride with succinic anhydride at 150-170
在酸催化下氨基胍和琥珀酸在水中的反应产生琥珀酸的胍基和二氰基酰肼的混合物,其变成难分离的 3-(5-amino-1H-1,2,4-triazol-3 混合物-yl)丙酸 (3) 和 3,3'-(ethane-1,2-diyl)bis(1H-1,2,4-triazol-5-amine) (5) 在碱性介质中。氨基胍盐酸盐与琥珀酸酐在 150-170 °C 的融合导致区域选择性形成 2-(2,5-dioxopyrrolidin-1-yl)guanidine hydrochloride (11)。化合物11在碱存在下在水溶液中加热后定量重排成3-(5-氨基-1H-1,2,4-三唑-3-基)丙酸(3)。该反应代表了 2,5-二氧代吡咯烷系列的新重排。通过 pK a 测定、IR、