Stanetty, Peter; Puschautz, Erhard published the artcile< Herbicidal thienylureas. II>, Reference of 31166-29-7, the main research area is thienylurea; thiophenecarboxylic acid preparation Curtius degradation; urea thienyl.
Syntheses of thiophenecarboxylic acids, e.g., I (R = Cl, R1 = Me, MeO; R = Me, R1 = Cl; R = H, R1 = 4-ClC6H4O; R = Me2CH, R1 = H) are described. A modified Curtius degradation was the key step for the formation of thienylureas from I. These thienylureas are related to 2nd generation urea herbicides.
Monatshefte fuer Chemie published new progress about 31166-29-7. 31166-29-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C5H2Cl2O2S, Reference of 31166-29-7.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics