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221468-00-4

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221468-00-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221468-00-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,4,6 and 8 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221468-00:
(8*2)+(7*2)+(6*1)+(5*4)+(4*6)+(3*8)+(2*0)+(1*0)=104
104 % 10 = 4
So 221468-00-4 is a valid CAS Registry Number.

221468-00-4Relevant articles and documents

The synthesis of asimilobin and the correction of its tetrahydrofuran segment's configuration

Wang, Zhi-Min,Tian, Shi-Kai,Min, Shi

, p. 977 - 980 (1999)

A highly efficient synthetic method for the trans/threo/trans- bis- tetrahydrofuran (THF) ring building block was established. The title compound was synthesized in thirteen steps from trans-1,4-dichloro-2-butene via a convergent route with a Wittig reaction as the key step. The absolute configuration of the THF segment of naturally occurring asimilobin should be corrected.

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