Structural and theoretical evidence of the reaction products of ethyl(ethoxymethylene)cyanoacetate with 5-phenoxymethyl-2-amino-2-oxazoline
作者:C. Chaimbault、J.J. Bosc、C. Jarry、J.M. Leger、N. Marchand-Geneste、A. Carpy
DOI:10.1016/s0022-2860(99)00059-9
日期:1999.9
Abstract The reaction between ethyl(ethoxymethylene)cyanoacetate and 5-phenoxymethyl-2-amino-2-oxazoline leads to a 1,4-adduct and to a 2,3-dihydrooxazolo[3,2-a]pyrimidin-5-one. The structures were assigned by spectroscopy and, for the cyclocondensation compound, by X-ray crystallography. The question of regioselectivity was studied by a theoretical approach in order to determine the more reliable
摘要(乙氧基亚甲基)氰基乙酸乙酯与5-苯氧基甲基-2-氨基-2-恶唑啉反应生成1,4-加合物和2,3-二氢恶唑并[3,2-a]嘧啶-5-酮。结构通过光谱学指定,对于环缩合化合物,通过 X 射线晶体学指定。通过理论方法研究了区域选择性问题,以确定更可靠的反应途径。提出了一个意想不到的机理方案来解释环缩合化合物的形成。