Competition between cyclisation and bisimine formation in the reaction of 1,3-diaminopropanes with aromatic aldehydes
作者:Julie M. Locke、Renate Griffith、Trevor D. Bailey、Robyn L. Crumbie
DOI:10.1016/j.tet.2009.10.060
日期:2009.12
Condensation of 1,3-diamines with aldehydes or ketones gives rise to two major products, the hexahydropyrimidine and the bisimine. Experimental studies of the reaction between a range of aromatic aldehydes and 1,3-diaminopropane or 1,3-diamino-2-propanol establish that the hexahydropyrimidine is favoured by the less nucleophilic amine and by the presence of electron withdrawing groups on the aryl ring