Abstract
The reaction of N,N'-bis(arylmethylidene)arylmethane diimines with thiourea under reflux in methanol was studied. The reaction gave a diastereomeric mixture of 4,6-disubstituted 1,3,5-triazinane-2-thiones in good yields. Two diastereoisomers of 4,6-diphenyl-1,3,5-triazinane-2-thione were detected in a solution of CDCl 3 by NMR analysis. According to the NMR studies, the cis-diastereoisomer undergoes a solvent-induced cis/trans-isomerization process, producing the trans-diastereoisomer in DMSO. The stereochemistry of the trans-diastereoisomer was determined by X-ray crystallographic analysis.
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