cas 100987-89-1, 5-(4-ISOPROPYLPHENYL)-1,3,4-THIADIAZOL-2-AMINE | Articles data ｜lookchem

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100987-89-1

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PhI-Catalyzed Intramolecular Oxidative Coupling Toward Synthesis of 2-Amino-1,3,4-Thiadizoles
A highly efficient method for the synthesis of thiadiazole derivatives via intramolecular oxidative coupling of thiosemicarbazide, using the in situ generated hypervalent iodine(III) reagents is developed. The protocol can be carried out smoothly and provides a variety of thiadiazole derivatives in moderate to excellent yields. Graphical Abstract: A highly efficient method for the synthesis of thiadiazole derivatives via PhI-catalyzed intramolecular oxidative coupling of thiosemicarbazide has been developed.
Han, Yingzhi,Sun, Yadong,Abdukader, Ablimit,Liu, Bifu,Wang, Duozhi
p. 3486 - 3491
(2018/09/27)

Synthesis and antiallergy activity of [1,3,4]thiadiazolo[3,2-a]-1,2,3-triazolo[4,5-d]pyrimidin-9(3H)-one derivatives. I
A series of 6-substituted [1,3,4]thiadiazolo[3,2-a]-1,2,3-triazolo[4,5-d]pyrimidin-9(3H)-one derivatives 4a-z were synthesized from 5-substituted-1,3,4-thiadiazol-2-amines 5 by the following consecutive reactions: pyrimidine ring closure with bis(2,4,6-trichlorophenyl) malonate, nitration, chlorination, amination, hydrogenation and diazotization. The structure of 4 was confirmed by an alternate synthesis of 4, involving reaction of 5-substituted 2-azido-1,3,4-thiadiazole 13 with ethyl cyanoacetate, followed by the Dimroth rearrangement and ring closure. The antiallergic activities (anti-passive peritoneal anaphylaxis, anti-passive cutaneous anaphylaxis and anti-slow reacting substance of anaphylaxis activities) of the products were evaluated.
Suzuki,Miwa,Aibara,Kanno,Takamori,Tsubokawa,Ryokawa,Tsukada,Isoda
p. 357 - 363
(2007/10/02)

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Chemical Properties

Boiling Point: 369.3°Cat760mmHg
Flash Point:177.1°C
Density: 1.198g/cm³
Storage Temp.:2-8°C(protect from light)
Vapor Pressure: 1.2E-05mmHg at 25°C
PSA: 80.77000
LogP: 2.84080

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