Cas 1571925-65-9,1,3'-dimethyl-4'-phenylspiro[indoline-3,2'-pyran]-2,6'(3'H)-dione

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Check Digit Verification of cas no

The CAS Registry Mumber 1571925-65-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,7,1,9,2 and 5 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1571925-65:
(9*1)+(8*5)+(7*7)+(6*1)+(5*9)+(4*2)+(3*5)+(2*6)+(1*5)=189
189 % 10 = 9
So 1571925-65-9 is a valid CAS Registry Number.

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1571925-65-9Relevant academic research and scientific papers

NHC-catalyzed oxidative γ-addition of α,β-unsaturated aldehydes to isatins: A high-efficiency synthesis of spirocyclic oxindole-dihydropyranones

Liu, Rui,Yu, Chenxia,Xiao, Zhaoxin,Li, Tuanjie,Wang, Xiangshan,Xie, Yuanwei,Yao, Changsheng

, p. 1885 - 1891 (2014)

This manuscript discloses an efficient construction of the spirocyclic oxindole-dihydropyranone scaffold via the N-heterocyclic carbene (NHC)-catalyzed oxidative γ-functionalization of α,β-unsaturated aldehydes bearing γ-H with isatin derivatives. The ready availability of the starting materials, easy work-up, mild reaction conditions and the potential utilization value of the products make this strategy attractive.

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