Racemic 3-Methyl-<i>r</i>-2,<i>c</i>-3,<i>c</i>-5-triphenylpyrrolidine and 3-Methyl-<i>r</i>-2,<i>t</i>-3,<i>c</i>-5-triphenylpyrrolidine
作者:L. B. Jerzykiewicz、T. Lis、J. Baran、D. Dziewońska-Baran
DOI:10.1107/s0108270197018155
日期:1998.6.15
The 1,3-diphenyl-2-azaallyl anion adds almost quantitatively to 2-phenylpropene with retention of the conformation of the anion. Two racemic diastereoisomeric [3+2] cycloadducts, i.e. the corresponding pyrrolidines, are formed, in which both phenyl substituents derived from the anion are cis oriented. The structures of racemic 3-methyl-r-2,c-3,c-5-triphenylpyrrolidine, C23H23N, (I), and 3-methyl-r-2,t-3,c-5-triphenylpyrrolidine, C23H23N, (II), were determined by X-ray analysis. There is no intermolecular hydrogen bonding in either crystal.