RACEMIC 3-METHYL-R-2,C-3,C-5-TRIPHENYLPYRROLIDINE AND 3-METHYL-R-2,T-3,C-5-TRIPHENYLPYRROLIDINE

The 1,3-diphenyl-2-azaallyl anion adds almost quantitatively to 2-phen ylpropene with retention of the conformation of the anion. Two racemic diastereoisomeric [3+2] cycloadducts, i.e. the corresponding pyrrolid ines, are formed, in which both phenyl substituents derived from the a nion 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-triphenyl pyrrolidine, C23H23N, (II), were determined by X-ray analysis. There i s no intermolecular hydrogen bonding in either crystal.