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74282-81-8

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74282-81-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74282-81-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,2,8 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 74282-81:
(7*7)+(6*4)+(5*2)+(4*8)+(3*2)+(2*8)+(1*1)=138
138 % 10 = 8
So 74282-81-8 is a valid CAS Registry Number.

74282-81-8Relevant articles and documents

Enantioselective conjugate addition of ketones to nitroalkenes catalyzed by pyrrolidine-sulfamides

Wang, Jinjia,Lao, Jinhua,Du, Quansheng,Nie, Shaozhen,Hu, Zhipeng,Yan, Ming

experimental part, p. 232 - 238 (2012/06/01)

A series of chiral pyrrolidine-sulfamides were prepared and examined as the catalysts for conjugate addition of ketones to nitroalkenes. Benzoic acid was identified as the most efficient additives for the transformation. Excellent enantioselectivities, diastereoselectivities, and yields were achieved for the reaction of cyclohexanone with β-aryl nitroethylenes under solvent free conditions. β-Isopropyl nitroethylene is also applicable and the product could be obtained with excellent enantioselectivity after extended reaction time. A comparison of the catalytic behaviors of pyrrolidine-sulfamide organocatalysts with different side chains demonstrates that the enantioselectivity is mainly controlled by the chiral pyrrolidine unit and the additional chiral center at the side chain exerts neglectable effects. The H-bonding interaction between the sulfamide and the nitro group is proposed to be crucial for the activation of the nitroalkene and the constitution of well-organized transition state. Copyright

Highly enantioselective conjugate addition of aldehydes to nitroolefins catalyzed by chiral bifunctional sulfamides

Zhang, Xue-Jing,Liu, Sheng-Ping,Li, Xue-Ming,Yan, Ming,Chan, Albert S. C.

supporting information; experimental part, p. 833 - 835 (2009/07/10)

Chiral bifunctional sulfamides were found to be highly efficient organocatalysts for the conjugate addition of aldehydes to nitroolefins in the presence of base additives. The Royal Society of Chemistry.

Sulfonylamine-Mediated Sulfamation of Amines. A Mild High Yield Synthesis of Sulfamic Acid Salts

DuBois, Grant E.,Stephenson, Rebecca A.

, p. 5371 - 5373 (2007/10/02)

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