Results 221 to 230 of about 27,190 (294)
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Archiv der Pharmazie, 2021
Two series comprising 20 novel benzenesulfonamides bearing thioureido‐linked pyrazole 8 and amino‐1,2,4‐thiadiazole 10 were synthesized and assayed as human carbonic anhydrase (hCA) inhibitors against isoforms I and II as well as the tumor‐associated ...
R. Kumar +8 more
semanticscholar +1 more source
Two series comprising 20 novel benzenesulfonamides bearing thioureido‐linked pyrazole 8 and amino‐1,2,4‐thiadiazole 10 were synthesized and assayed as human carbonic anhydrase (hCA) inhibitors against isoforms I and II as well as the tumor‐associated ...
R. Kumar +8 more
semanticscholar +1 more source
Organic Letters, 2021
An operationally simple and sustainable one-pot photo-oxidative formal [3 + 2] heterocyclization of β-ketothioamides with aryldiazonium salts catalyzed by Ru(bpy)3Cl2 has been realized to provide 2,4-disubstituted 5-imino-1,2,3-thiadiazoles in good to ...
Pragya Pali +3 more
semanticscholar +1 more source
An operationally simple and sustainable one-pot photo-oxidative formal [3 + 2] heterocyclization of β-ketothioamides with aryldiazonium salts catalyzed by Ru(bpy)3Cl2 has been realized to provide 2,4-disubstituted 5-imino-1,2,3-thiadiazoles in good to ...
Pragya Pali +3 more
semanticscholar +1 more source
Journal of Organic Chemistry, 2020
A facile and efficient protocol for the construction of 3-substituted 5-amino-1,2,4-thiadiazoles has been developed through the electro-oxidative intramolecular dehydrogenative N-S bond formation of imidoyl thioureas.
Zan Yang +6 more
semanticscholar +1 more source
A facile and efficient protocol for the construction of 3-substituted 5-amino-1,2,4-thiadiazoles has been developed through the electro-oxidative intramolecular dehydrogenative N-S bond formation of imidoyl thioureas.
Zan Yang +6 more
semanticscholar +1 more source
Polycyclic aromatic compounds (Print), 2020
A novel series of bis(1,3,4-thiadiazole) derivatives were synthesized as a sole product in one step methodology by reaction of bis-hydrazonoylchloride 3 with many of hydrazinecarbodithioate derivatives 2a–e, 6a,b, and 8a–e.
Waleed A M A El-Enany +5 more
semanticscholar +1 more source
A novel series of bis(1,3,4-thiadiazole) derivatives were synthesized as a sole product in one step methodology by reaction of bis-hydrazonoylchloride 3 with many of hydrazinecarbodithioate derivatives 2a–e, 6a,b, and 8a–e.
Waleed A M A El-Enany +5 more
semanticscholar +1 more source
A 1,2,3-thiadiazole–1,2,3-thiadiazole rearrangement
J. Chem. Soc., Chem. Commun., 1983During its preparation, 4-ethoxycarbonyl-5-diazomethyl-1,2,3-thiadiazole (4), undergoes a ring transformation into the isomeric structure (5), but when the ester function in (4) is replaced by a phenyl group, no isomerization is observed.
Gerrit L'abbé +2 more
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Recent Developments in the Synthesis of 1,2,5-Thiadiazoles and 2,1,3-Benzothiadiazoles
Synthesis, 2019The fast-growing interest in 1,2,5-thiadiazoles and their fused analogues including 2,1,3-benzothiadiazoles in recent years as important compounds in materials science and biomedicine has led to great progress in the synthesis of these heterocyclic ...
O. Rakitin
semanticscholar +1 more source
ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
D. J. Wilkins, P. A. Bradley
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AbstractFor Abstract see ChemInform Abstract in Full Text.
D. J. Wilkins, P. A. Bradley
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Journal of Organic Chemistry, 2019
I2/DMSO-mediated C-S, S-N and C-N bond cross-coupling cyclization reaction for the synthesis of 5-acyl-1,2,3-thiadiazoles from enaminones, tosylhydrazine, and elemental sulfur has been developed under transition metal-free conditions.
Zan Yang +6 more
semanticscholar +1 more source
I2/DMSO-mediated C-S, S-N and C-N bond cross-coupling cyclization reaction for the synthesis of 5-acyl-1,2,3-thiadiazoles from enaminones, tosylhydrazine, and elemental sulfur has been developed under transition metal-free conditions.
Zan Yang +6 more
semanticscholar +1 more source
Chemical Communications, 2019
An efficient I2/CuCl2-promoted one-pot three-component strategy for the construction of 1,2,3-thiadiazoles from aliphatic- or aromatic-substituted methyl ketones, p-toluenesulfonyl hydrazide, and potassium thiocyanate has been developed.
Can Wang +6 more
semanticscholar +1 more source
An efficient I2/CuCl2-promoted one-pot three-component strategy for the construction of 1,2,3-thiadiazoles from aliphatic- or aromatic-substituted methyl ketones, p-toluenesulfonyl hydrazide, and potassium thiocyanate has been developed.
Can Wang +6 more
semanticscholar +1 more source
1968
Publisher Summary This chapter presents the review of organic and physical chemistry of monocyclic 1, 2, 5-thiadiazoles up to the early part of 1967. Reference is made to the 2, 1, 3-benzothiadiazoles and related compounds only as they contribute to the chemistry of the basic ring system. The 1, 2, 5-thiadiazole nucleus is numbered as in 4.
L M, Weinstock, P I, Pollak
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Publisher Summary This chapter presents the review of organic and physical chemistry of monocyclic 1, 2, 5-thiadiazoles up to the early part of 1967. Reference is made to the 2, 1, 3-benzothiadiazoles and related compounds only as they contribute to the chemistry of the basic ring system. The 1, 2, 5-thiadiazole nucleus is numbered as in 4.
L M, Weinstock, P I, Pollak
openaire +2 more sources