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83421-78-7

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83421-78-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83421-78-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,4,2 and 1 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 83421-78:
(7*8)+(6*3)+(5*4)+(4*2)+(3*1)+(2*7)+(1*8)=127
127 % 10 = 7
So 83421-78-7 is a valid CAS Registry Number.

83421-78-7Relevant articles and documents

Chiral phosphoric acid catalyzed enantioselective annulation of acyclic enecarbamates to: In situ -generated ortho -quinone methides

Gharui, Chandan,Singh, Shreya,Pan, Subhas Chandra

, p. 7272 - 7276 (2017/09/25)

The first organocatalytic asymmetric reaction of acyclic enecarbamates with o-quinone methides is disclosed. BINOL-based phosphoric acid catalysts were found to be suitable for the annulation reaction. With 10 mol% of the TRIP catalyst, high yields as well as excellent diastereo- and enantioselectivities are achieved for a variety of 2,3,4-trisubstituted chroman products.

Synthesis and Evaluation of Ureido- and Vinylureidopenicillins as Inhibitors of Intraruminal Lactic Acid Production

Clark, Robin D.,Caroon, Joan M.,Harrison, Ian T.,Kluge, Arthur F.,Unger, Stefan H.,et al.

, p. 1250 - 1253 (2007/10/02)

A series of 14 vinylureidopenicillins and a series of 9 ureidopenicillins were prepared by reaction of 6-aminopenicillanic acid with vinyl isocyanates and isocyanates.These compounds were evaluated for their potential to protect ruminants against lactic a

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