Kurfurst, Antonin published the artcile4-(5-Phenyl-1,3,4-oxadiazol-2-yl)biphenyl-4′-carboxylic acid: its functional derivatives and their heterocyclization into 1,3-thiazine-6-thiones, Safety of 1,1-Dimethylthiourea, the publication is Collection of Czechoslovak Chemical Communications (1990), 55(11), 2722-30, database is CAplus.
The title acid (I; R = CO2H) was prepared by hypobromite oxidation of acetyl derivative (I; R = COMe). The C-acylation of Cl2C:CH2 with acyl chloride (I; R = COCl) gave dichloroethenyl ketone (I; R = COCH:CCl2), which on cyclocondensation with appropriate thioamides gave thiazinethiones (II; R1 = Me, Ph, SMe, NH2, NMe2; X = O, S) and (III).
Collection of Czechoslovak Chemical Communications 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, Safety of 1,1-Dimethylthiourea.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia