Thermal [2+3]-cycloadditions of trans-1-methyl-2,3-diphenylaziridine with C=S and C=C dipolarophiles: An unexpected course with dimethyl dicyanofumarate
The thermal reaction of trans-1-methyl-2,3-diphenylaziridine (trans-1a) with aromatic and cycloaliphatic thioketones 2 in boiling toluene yielded the corresponding cis-2,4-diphenyl-1,3-thiazolidines cis-4 via conrotatory ring opening of trans-1a and a con