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158727-08-3

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158727-08-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 158727-08-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,7,2 and 7 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 158727-08:
(8*1)+(7*5)+(6*8)+(5*7)+(4*2)+(3*7)+(2*0)+(1*8)=163
163 % 10 = 3
So 158727-08-3 is a valid CAS Registry Number.

158727-08-3Relevant articles and documents

1,3-bis(phenylmercapto)propane and 1-chloro-3-(phenylmercapto)propane: Useful precursors for 1,3-dilithiopropane synthons in the preparation of 1,5- diols

Foubelo, Francisco,Yus, Miguel

, p. 5047 - 5051 (2007/10/03)

Treatment of 1,3-bis(phenylmercapto)propane (1) with an excess of lithium and a catalytic amount of DTBB (3.5 mol%) at -78°C followed by reaction with a carbonyl comPOund [BuCHO, PhCHO, (PhCH2)2CO, Et2CO, (CH2)7CO, [(CH2)7CO])-menthone, Ph2CO] leads, after hydrolysis with water, to symmetrically substituted 1,5-diols (2). Starting from 1-chloro-3- (phenylmercapto)propane (3) and by successive treatment with: (a) lithium- naphthalene at -78°C; (b) a carbonyl compound {Me2CO, (CH2)5CO, (CH2)7CO, (-)-menthone, [CH3(CH2)4]2CO] at the same temperature; (c) lithium powder at -50°C; and (d) a second carbonyl compound ['BuCHO, PhCHO] at the same temperature and final hydrolysis with water yields unsymmetrically substituted 1,5-diols (4). (C) 2000 Elsevier Science Ltd.

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