Abstract
3-Alkyl-5-dimethyaminomethylidene-2-thioxo-imidazolidin-4-ones 3 ( a– c) available in two steps from methyl glycinate hydrochloride, represent a useful synthetic tool for efficient and mild solventless preparations of new alkylaminomethylidene derivatives of 2-thiohydantoins 8 ( a– e ), 10 ( a– c) and 12 ( a– d) by stereocontrolled transamination reactions under microwave irradiations. The 1H, 13C NMR spectrum and the (5 Z)-conformation of some representatives products are also discussed.
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