688798-57-4Relevant articles and documents
AEROBIC OXIDATIVE SYNTHESIS OF SULFONAMIDE USING Cu CATALYST
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Paragraph 0033-0037; 0039-0054; 0066-0069; 0163-0164, (2021/04/06)
The present invention relates to a method for oxidative synthesis of sulfonamides using copper catalysts. , Oxygen (O) is used. 2 The oxidative synthesis of sulfonamides (1) comprises reacting a 2 th or sulfonyl hydrazide primary amine with a sulfonyl hydrazide (sulfonamide) with a copper catalyst on a solvent under the conditions in which the sulphonamide is fed. The oxidation coupling of the present invention showed extensive substrate ranges in an amine comprising a 2 primary amine, 1 primary amine and amine hydrochloride salt. It is worth notable that non-reactive aliphatic sulfonyl hydrazides in previously reported anaerobic systems can be used for the aerobic oxidation coupling of the present invention. The oxidation coupling of the present invention has been more effective on large scale.
Cu-catalyzed aerobic oxidative synthesis of sulfonamides from sulfonyl hydrazides and amines
Chung, Sohyun,Kim, Jinho
supporting information, p. 792 - 795 (2019/02/16)
An environmentally friendly route for sulfonamides has been developed. The oxidative coupling of sulfonyl hydrazides and amines was catalyzed by CuBr2 to produce various sulfonamides with the water and nitrogen gas as byproducts. Preliminary experiments revealed that the sulfonyl radical is likely to be involved in the reaction mechanism.
Iodine-catalyzed expeditious synthesis of sulfonamides from sulfonyl hydrazides and amines
Yotphan, Sirilata,Sumunnee, Ladawan,Beukeaw, Danupat,Buathongjan, Chonchanok,Reutrakul, Vichai
, p. 590 - 597 (2016/01/12)
A new synthesis of sulfonamides has been developed via an iodine-catalyzed sulfonylation of amines with arylsulfonyl hydrazides. This metal-free strategy employs readily accessible and easy to handle starting materials, catalysts and oxidants, and can be easily conducted under mild conditions, providing a convenient access to a wide range of sulfonamides in moderate to excellent yields within a short reaction time.
Palladium-catalysed dehydrogenative sp3 C-H bonds functionalisation into alkenes: A direct access to N-alkenylbenzenesulfonamides
Bheeter, Charles B.,Jin, Rongwei,Bera, Jitendra K.,Dixneuf, Pierre H.,Doucet, Henri
, p. 119 - 124 (2014/03/21)
The palladium-catalysed dehydrogenation of sp3 carbon-hydrogen bonds of N-alkylbenzenesulfonamides allows a simple access to N-alkenylbenzenesulfonamides. The reaction proceeds with easily accessible catalysts, with pivalate as a base, and allo
PHENETHANOLAMINE DERIVATIVES FOR THE TREATMENT OF RESPIRATORY DISEASES
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Page 46, (2010/02/06)
The present invention relates to novel compounds of formula (I), to a process for their manufacture, to pharmaceutical compositions containing them, and to their use in therapy, in particular their use in the prophylaxis and treatment of respiratory diseases.