Synthesis and crystal structure of 3-{(2-carboxyethyl)-[2-(3-methylpyrazol-1-yl)-ethyl]amino}- and 3-{(2-carboxyethyl)[2-(5- methylpyrazol-1-yl)-ethyl]amino} propionic acids
作者:O. A. Attaryan、A. O. Baltayan、R. A. Tamazyan、A. G. Aivazyan、G. A. Panosyan、G. V. Asratyan
DOI:10.1134/s1070363209040343
日期:2009.4
As known, esters including the pyrazole-containing ones [1–4] are hydrolyzed in the presence of acids or bases. It was found that compounds III, IV are partially hydrolyzed during distillation evidently due to the specific intramolecular basic catalysis with the participation of NH group of the aliphatic chain [5]. It was established by means of the X-ray study by an example of substance V that compounds
众所周知,酯包括含吡唑的酯 [1-4] 在酸或碱的存在下水解。研究发现,化合物 III、IV 在蒸馏过程中被部分水解,这显然是由于脂肪链的 NH 基团参与的特定分子内碱性催化作用[5]。通过对物质 V 的一个例子的 X 射线研究确定,得到的化合物 V、VI 仅以盐的形式存在。3-[2-(3-甲基吡唑-1-基)乙基氨基]丙酸(V)。1-(β-氨基乙基)-3-甲基吡唑 I,12.5 g,DOI:10.1134/S1070363209040343