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91613-80-8

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91613-80-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91613-80-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,1 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91613-80:
(7*9)+(6*1)+(5*6)+(4*1)+(3*3)+(2*8)+(1*0)=128
128 % 10 = 8
So 91613-80-8 is a valid CAS Registry Number.

91613-80-8Downstream Products

91613-80-8Relevant articles and documents

Condensation of cyclic and acyclic imines with phthalide anions. Synthesis of protoberberines and substituted 3,4-dihydro-2-methyl-1(2H)-isoquinolones

Marsden, Richard,MacLean, David B.

, p. 1392 - 1399 (2007/10/02)

3,4-Dihydroisoquinolines react with anions derived from phthalides and 3-methylphthalides in tetrahydrofuran yielding 13-hydroxy-8-oxotetrahydroprotoberberines and 13-hydroxy-13-methyl-8-oxotetrahydroprotoberberines, respectively.Only one of two possible diastereomers is formed.The lactams may be reduced to the corresponding protoberberines with lithium aluminium hydride.The reaction of the acyclic imine, 3,4-dimethoxybenzylidenemethylamine, with anions derived from phthalide, 3-phenylphthalide, and 5,6-dimethoxyphthalide, has been investigated.In all cases separable mixtures of diastereomeric substituted 3,4-dihydro-1(2H)-isoquinolones were formed.

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