作者:V. V. Pakal’nis、I. V. Zerova、S. I. Yakimovich、V. V. Alekseyev
DOI:10.1007/s10593-013-1261-x
日期:2013.6
Hydrazides reacted with acylpyruvic acid esters possessing a terminal straight chain alkyl substituent at the C=O bond distal from the ester group, giving 5-hydroxy-2-pyrazolines. Acylpyruvates with bulky terminal substituents underwent condensation at the C=O bond adjacent to the ester group, giving products with hydrazone or 5-hydroxy-2-pyrazoline structure and capable of displaying ring-chain equilibrium
酰肼与在酯基远端的C = O键处具有末端直链烷基取代基的酰基丙酮酸酯反应,得到5-羟基-2-吡唑啉。具有大的末端取代基的酰基丙酮酸在与酯基相邻的C = O键处缩合,得到具有或5-羟基-2-吡唑啉结构并且能够在溶液中的这些互变异构体之间显示环链平衡的产物。