A sequential one-pot synthesis of N-sulfonylcyclothioureas from N-monosulfonyl diamines, CS 2 and chloroacetic acid at room temperature in water is described. In the absence of highly toxic thiophosgene and organic solvents, this method is environmentally benign. Simple reaction conditions, easy purification of the products, good yields and thioglycolic acid as the useful byproduct are also important attributes of this methodology. The plausible mechanism including tandem reactions is proposed.

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Na 2 CO 3 and oxydiacetic acid or thiodiacetic acid, respectively. Complex 1 is a one-dimensional polymer with a planar bridging oxydiacetate ligand in a meridional disposition; whereas 2 is a monomer containing the typical tridentate thiodiacetate ligand with a facial configuration. Both are, as far as we know, the first structural determinations of Mg-oda and Mg-tda complexes [1].

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C h emIn fo rm 2 0 1 2 , 4 3 , issu e 1 0 © 2 0 1 2 Wiley -VCH Verl ag G m b H & Co. K G a A , We i n he i m R i n g cl o s ur e r e ac t i o ns O 0 130 DOI: 1 0.100 2/ch in.201 2100 29 F a cile Synthesis of N -Sulfonylcyclothioureas in Water. -The rea c tion is c onducted u nde r e nviron men tally b enign con ditions, a voidin g he ating , thiop hosgen e, a nd org a ni c so l v en t s . -(W AN , G. ; XU , L . ; M A, X. ; Z H AN G, Y. ; W AN G, J. ; Z H AN G, J. ; M A*, N.; Chin.