Kaye, Perry T. published the artcileN,N-Disubstituted 2-aminothiazole-5-carboxylates: preparation and rotation of functional groups, SDS of cas: 6972-05-0, the publication is Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) (1983), 1677-80, database is CAplus.
Fourteen new 2-(dialkylamino)thiazole-5-carboxylates were prepared by cyclocondensation of ¦Á-bromo ¦Â-oxo esters with N,N-disubstituted thioureas. Thus, cyclocondensation of HCOCHBrCO2Et with H2NCSNMe2 in refluxing EtOH gave thiazole I. The IR spectra of these compounds show carbonyl doublets arising from the carbonyl O,S-syn-s-trans and anti-s-trans rotamers. Variable temp 1H NMR study showed barriers to rotation of the 2-amino groups of 41-47 kJ/mol. There is a strong mesomeric attraction between the carboxylate and amine groups.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, SDS of cas: 6972-05-0.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia