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121846-03-5

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121846-03-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121846-03-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,8,4 and 6 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121846-03:
(8*1)+(7*2)+(6*1)+(5*8)+(4*4)+(3*6)+(2*0)+(1*3)=105
105 % 10 = 5
So 121846-03-5 is a valid CAS Registry Number.

121846-03-5Relevant articles and documents

Fully synthetic stereoselective routes to the differentially protected subunits of the tunicamycins

Danishefsky,DeNinno,Chen,Boisvert,Barbachyn

, p. 5810 - 5818 (2007/10/02)

Total synthesis of the two subunits corresponding to tunicamycins have been achieved. One of the key steps involves a cyclocondensation reaction of 7-carbon aldehydo nucleoside with activated diene 8 under catalysis with stannic chloride (see 7 + 8→9a,b). Stereospecific Fitzsimmons cycloadditions of dibenzyl azodicarboxylate to galactal 12 and glucal 22 simplified construction of the amino pyranose systems.

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