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87768-46-5

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87768-46-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87768-46-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,7,6 and 8 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 87768-46:
(7*8)+(6*7)+(5*7)+(4*6)+(3*8)+(2*4)+(1*6)=195
195 % 10 = 5
So 87768-46-5 is a valid CAS Registry Number.

87768-46-5Relevant articles and documents

Tf2O-Mediated Intermolecular Coupling of Secondary Amides with Enamines or Ketones: A Versatile and Direct Access to β-Enaminones

Liu, Yong-Peng,Zhu, Cheng-Jie,Yu, Cun-Cun,Wang, Ai-E,Huang, Pei-Qiang

supporting information, p. 7169 - 7174 (2019/11/16)

Based on the Tf2O-mediated intermolecular reaction of secondary amides with enamines derived from ketones, a novel approach to β-enaminones has been developed. The reaction is widely functional group tolerant and highly chemoselective. In the presence of 4 ? molecular sieves, the method can be extended to the one-pot condensation of secondary amides with ketones for NH β-enaminones synthesis.

Practical and highly regio- and stereoselective synthesis of 2-substituted dihydropyridines and piperidines: Application to the synthesis of (-)-coniine [17]

Charette,Grenon,Lemire,Pourashraf,Martel

, p. 11829 - 11830 (2007/10/03)

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