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33664-91-4

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33664-91-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33664-91-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,6,6 and 4 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 33664-91:
(7*3)+(6*3)+(5*6)+(4*6)+(3*4)+(2*9)+(1*1)=124
124 % 10 = 4
So 33664-91-4 is a valid CAS Registry Number.

33664-91-4Relevant articles and documents

Efficient synthesis of spirooxindolyl oxazol-2(5: H)-ones via palladium(ii)-catalyzed addition of arylboronic acids to nitriles

Song, Hao,Cheng, Na,She, Li-Qin,Wu, Yi,Liao, Wei-Wei

, p. 29424 - 29428 (2019)

A versatile synthesis of spirooxindolyl oxazol-2(5H)-ones via palladium(ii)-catalyzed addition of arylboronic acids to nitriles is described. A wide range of spirooxindolyl oxazol-2(5H)-ones and other spirocyclic frameworks incorporating the oxazol-2(5H)-one unit can be readily prepared in good to high yields under the optimal conditions.

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