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31280-33-8

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31280-33-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 31280-33-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,2,8 and 0 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 31280-33:
(7*3)+(6*1)+(5*2)+(4*8)+(3*0)+(2*3)+(1*3)=78
78 % 10 = 8
So 31280-33-8 is a valid CAS Registry Number.

31280-33-8Relevant articles and documents

Visible light-induced C-C bond cleavage in a multicomponent reaction cascade allowing acylations of sulfoximines with ketones

Bolm, Carsten,Ma, Ding,Shi, Peng,Tu, Yongliang,Wang, Chenyang,Zhang, Duo

supporting information, p. 8096 - 8101 (2021/10/04)

Visible light induces C-C-bond cleavage reactions of ketones, which can be utilized forN-acylations of sulfoximines. No (photo)catalyst is required, and the reactions occur at ambient temperature in air. The substrate scope is broad for both ketones and sulfoximines. For convertingNH-sulfoximines, the presence of NBS is essential.

Copper-catalyzed preparation of N-aroylated sulfoximines from methylarenes

Hou, Anguo,Zhao, Zijian

supporting information, p. 1201 - 1208 (2017/07/06)

A copper-catalyzed methodology for the preparations of N-aroylated sulfoximines from methylarenes was herein demonstrated. The transformation proceeded with the assistance of external oxidant tert-butyl hydroperoxide, requiring for no additional solvents or ligands. The good compatibility and high efficiency of the newly developed protocol were well described by 21 examples and up to 91% yields. Moreover, the protocol was proved by the control reactions to proceed through a radical pathway.

Copper-catalyzed oxidative decarboxylative coupling of α-keto acids and sulfoximines

Pimpasri, Chaleena,Sumunnee, Ladawan,Yotphan, Sirilata

, p. 4320 - 4327 (2017/07/10)

A copper-catalyzed oxidative decarboxylative coupling of α-keto acids with NH-sulfoximines has been developed. With CuBr as the catalyst and K2S2O8 as the oxidant, this reaction enables the formation of a C-N bond and gives N-aroylsulfoximine products in moderate to excellent yields. The reaction mechanism is likely to involve the generation of a reactive aroyl radical intermediate.

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