The reaction of carbon disulfide with α-methylaminonitriles 1 yields 5-iminothiazolidine-2- thiones 3, which on prolonged reaction are converted to 5-methyliminothiazolidine-2-thiones 5 and 2, 4-dithiohydantoins 9. A mechanism for this apparent methyl transfer is advanced. The yellow compounds obtained by prolonged reaction of the aminonitriles 1 (R1= R2= Me and R1= Et, R2= Me) are not isomers of the imines 3 (R1= R2= Me and R1= Et, R2= Me), ...
