A Highly Atom Economic, Chemo-, Regio- and Stereoselective Synthesis and Crystal Structure of Novel Spiro-Cyclopentanone
作者:C.G. Zhao、Y.J. Jin、C.G. Zheng、Q.Q. Tang、G. Liang、S.L. Yang
DOI:10.14233/ajchem.2013.15413
日期:——
The 1,3-dipolar cycloaddition of azomethine ylides derived from acenaphthenequinone and a-amino acid (sarcosine) to a series of 2,5-bis(fluorobenzylidene) cyclopentanones afforded novel spiro-cyclopentanone-pyrrolizines chemo-, regio- and stereoselectively in quantitative yields (95-96 %). The crystal structure of one compound containing bis(2,6- difluorobenzyl) (2b) is described. The cyclopentane rings in bis(2,6-difluorobenzyl) (2b) have an envelope conformation.
从苊醌和 a-氨基酸(肌氨酸)衍生出的偶氮甲基酰化物与一系列 2,5-双(氟亚苄基)环戊酮进行 1,3-二极环加成反应,以化学、区域和立体选择性的方式得到了新颖的螺环戊酮-吡咯烷类化合物,定量收率为 95-96%。文中描述了一种含有双(2,6- 二氟苄)(2b)的化合物的晶体结构。双(2,6-二氟苄)(2b) 中的环戊烷环具有包络构象。