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1605294-33-4

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1605294-33-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1605294-33-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,0,5,2,9 and 4 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1605294-33:
(9*1)+(8*6)+(7*0)+(6*5)+(5*2)+(4*9)+(3*4)+(2*3)+(1*3)=154
154 % 10 = 4
So 1605294-33-4 is a valid CAS Registry Number.

1605294-33-4Relevant articles and documents

Modern friedel-crafts chemistry. part 37. efficient syntheses of some new julolidines via cyclialkylations of heteroaryl carbinols

Abd El-Aal, Hassan A. K.,Khalaf, Ali A,El-Khawaga, Ahmed M. A

, p. 262 - 268 (2014/02/14)

A simple and convenient procedure for the synthesis of some novel alkyl-substituted and aryl-substituted julolidines is reported. Julolidines were smoothly synthesized in excellent isolated yields via Friedel-Crafts intramolecular alkylations of heteroarylalkanols in the presence of both Bronsted (PPA) and Lewis (AlCl3/CH3NO2) acid catalysts. The precursors alkanols, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, were readily prepared both by reaction of selectively synthesized carboxylic acid esters and ketones with different Grignard reagents and also by reduction of the synthesized ketones with LAH. A plausible carbocation mechanism is proposed to account for the results. The structures of the compounds are established using both spectral and analytical data.

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