Xu Liang
2010
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Journal
Chinese Journal of Synthetic Chemistry
Abstract
N-Boc protected pyrazoline reacted with PhMgBr in CH2Cl2 in the presence of hexamethylphosphora mide to prepare tetrahydropyrazol(4)and racemic 1,3-diphenyl-1,3-propanediamine(1)was synthesized form 4 in total yield of 35%.1 was resolved with(-)-dibenzoyl-L-tartrate acid to obtaine optically pure(1S,3S)-1,3-diphenyl-1,3-propanediamine.The structures were confirmed by 1H NMR.