23282-97-5Relevant academic research and scientific papers
Design and Synthesis of 1,3,4-Thiadiazole Derivatives as Novel Anticancer and Antitubercular Agents
Chandra Sekhar,Venkata Rao,Tejeswara Rao,Lav Kumar,Jha, Anjali
, p. 770 - 779 (2019/06/05)
A series of novel 5-phenyl-substituted 1,3,4-thiadiazole-2-amines were designed, synthesized, and screened for their antitumor and antitubercular activities. The target compounds were synthesized starting from isocyanates and acid hydrazides by convention
Synthesis of 2-amino-substituted-1,3,4-thiadiazoles via 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) mediated intramolecular C-S bond formation in thiosemicarbazones
Singh, Sarangthem Joychandra,Rajamanickam, Suresh,Gogoi, Anupal,Patel, Bhisma K.
supporting information, p. 1044 - 1047 (2016/02/18)
An effective oxidative intramolecular cyclization (C-S bond formation) of thiosemicarbazones using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) has been developed to afford a diverse array of 2-amino-substituted-1,3,4-thiadiazoles. The attractive featu
Regioselective synthesis of 2-amino-substituted 1,3,4-oxadiazole and 1,3,4-thiadiazole derivatives via reagent-based cyclization of thiosemicarbazide intermediate
Yang, Seung-Ju,Lee, Seok-Hyeong,Kwak, Hyun-Jung,Gong, Young-Dae
, p. 438 - 444 (2013/04/10)
A regioselective, reagent-based method for the cyclization reaction of 2-amino-1,3,4-oxadiazole and 2-amino-1,3,4-thiadiazole core skeletons is described. The thiosemicarbazide intermediate 3 was reacted with EDC·HCl in DMSO or p-TsCl, triethylamine in N-
Dithiocarbamate as an efficient intermediate for the synthesis of 2-amino-1,3,4-thiadiazoles in water
Aryanasab, Fezzeh,Halimehjani, Azim Ziyaei,Saidi, Mohammad R.
supporting information; experimental part, p. 790 - 792 (2010/03/24)
A new and facile protocol for the synthesis of 2-amino-1,3,4-thiadiazoles in water is described. Reaction of acid hydrazides with easily prepared dithiocarbamates gives the corresponding thiadiazoles in moderate to excellent yields. 2-Amino-1,3,4-oxadiazoles were not observed as side products using this procedure.
New access to pyrazole, oxa(thia)diazole and oxadiazine derivatives
Hassan, Alaa A.,El-Shaieb, Kamal M.,Shaker, Raafat M.,Doepp, Dietrich
, p. 12 - 19 (2007/10/03)
1,4-Disubstituted thiosemicarbazides 1b-f reacted with ethenetetracarbonitrile (5) in dimethylformamide with formation of 2-substituted 5-phenyl-1,3,4-thiadiazoles 2a-f and 2-substituted 5-phenyl-1,3,4-oxadiazoles 4a-f. Upon addition of 5 to 1c-e in chlorobenzene, 3-amino-2-benzoyl-4,5,5- tricyano-2,5-dihydro-1H-pyrazole- 1-[N-(4-tricyanovinyl)phenyl]carbothioamide (12), 5-benzylamino-, and 5-allylamino-4-benzoyl-2,3-dihydro-[1,3,4]thiadiazol- 2,2-dicarbonitrile (13a,b) and 5-amino-1-benzoylpyrazole-3,4-dicarbonitrile (14) as well as 2-phenyl-4H-[1,3,4]-oxadiazine-5,6-dicarbonitrile (15) were formed. Rationales for the role of the solvent and the conversions observed are presented.
