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1621401-12-4

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1621401-12-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1621401-12-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,1,4,0 and 1 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1621401-12:
(9*1)+(8*6)+(7*2)+(6*1)+(5*4)+(4*0)+(3*1)+(2*1)+(1*2)=104
104 % 10 = 4
So 1621401-12-4 is a valid CAS Registry Number.

1621401-12-4Downstream Products

1621401-12-4Relevant articles and documents

Directed lithiation of N′-[2-(4-methoxyphenyl)ethyl]-N, N-dimethylurea and tert-butyl [2-(4-methoxyphenyl)ethyl]carbamate

Smith, Keith,El-Hiti, Gamal A.,Alshammari, Mohammed B.

, p. 394 - 402 (2014/02/14)

N′-[2-(4-Methoxyphenyl)ethyl]-N,N-dimethylurea and tert-butyl [2-(4-methoxyphenyl)ethyl]carbamate are doubly lithiated on the nitrogen and ortho to the directing metalating group at -20 to 0 °C with three mole equivalents of n-BuLi in anhydrous THF. Reactions of the dilithium reagents produced in situ with various electrophiles give high yields of the corresponding substituted products. In the case of the urea, side-products due to lithiation and substitution on one of the methyl groups of the urea unit are obtained in low yields (0-17%). Georg Thieme Verlag KG Stuttgart · New York.

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