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136057-08-4

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136057-08-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136057-08-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,0,5 and 7 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 136057-08:
(8*1)+(7*3)+(6*6)+(5*0)+(4*5)+(3*7)+(2*0)+(1*8)=114
114 % 10 = 4
So 136057-08-4 is a valid CAS Registry Number.

136057-08-4Relevant articles and documents

APPLICATION OF 4-AZIDOBENZYL GROUP TO PROTECTION OF HYDROXYL FUNCTIONS

Fukase, Koichi,Hashida, Manabu,Kusumoto, Shoichi

, p. 3557 - 3558 (1991)

The 4-azidobenzyl ether can be readily formed and cleaved either by direct oxidation with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) or by oxidation after conversion to the 4-aminobenzyl ether or the corresponding iminophosphorane derivative.In the latter two-step cleavage methods the azidobenzyl group is removed in preference to the 4-methoxybenzyl (MPM) group, whereas the MPM group can be selectively removed by the direct DDQ oxidation.

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