Cas 1616919-23-3,C21H19NO3

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Check Digit Verification of cas no

The CAS Registry Mumber 1616919-23-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,1,6,9,1 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1616919-23:
(9*1)+(8*6)+(7*1)+(6*6)+(5*9)+(4*1)+(3*9)+(2*2)+(1*3)=183
183 % 10 = 3
So 1616919-23-3 is a valid CAS Registry Number.

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1616919-23-3Relevant academic research and scientific papers

N-heterocyclic carbene/Lewis acid strategy for the stereoselective synthesis of spirocyclic oxindole-dihydropyranones

Xiao, Zhaoxin,Yu, Chenxia,Li, Tuanjie,Wang, Xiang-Shan,Yao, Changsheng

, p. 3632 - 3635 (2014)

Under the cooperative catalysis of NHC/Lewis acid, the mild, straightforward [4 + 2] annulation of α-bromo-α,β-unsaturated aldehydes bearing γ-H with isatin derivatives gave spirocyclic oxindole-dihydropyranones stereoselectively. This approach is particu

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