140628-13-3Relevant articles and documents
AMINOMETHYLATION OF THIOUREA DERIVATIVES WITH N-METHYLENE-tert-BUTYLAMINE. II. N,N'- AND N,N,N'-SUBSTITUTED THIOUREAS
Kovalenko, A. L.,Tselinskii, I. V.
, p. 1728 - 1730 (2007/10/02)
Reactions of 1,3-disubstituted thioureas with N-methylene-tert-butylamine without solvent proceed by a reaction of the Mannich type with formation of 1-R1-3-R2-5-tert-butyl-3,4,5,6-tetrahydro-1,3,5-triazine-2-thiones and tert-butylamine; 1,1,3-trisubstituted thioureas do not react with N-methylene-tert-butylamine as a consequence of steric hindrance, caused by the N-tert-butyl group, for the formation of the key iminium salt.