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221468-61-7

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221468-61-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221468-61-7 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, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 221468-61:
(8*2)+(7*2)+(6*1)+(5*4)+(4*6)+(3*8)+(2*6)+(1*1)=117
117 % 10 = 7
So 221468-61-7 is a valid CAS Registry Number.

221468-61-7Downstream Products

221468-61-7Relevant articles and documents

A facile route to bulladecin-type acetogenins - Total synthesis of asimilobin and correction of the configuration of its tetrahydrofuran segment

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

, p. 349 - 356 (2007/10/03)

The most efficient method for the synthesis of the trans/threo/trans- bis(tetrahydrofuran) (THF) ring unit was established, and the first total synthesis of (-)-asimilobin and its diastereomer was then accomplished in twelve and fourteen steps, respectively, from trans-1,5,9-decatriene, by a convergent route with a Wittig reaction as the key step. By virtue of these synthetic results, the absolute configuration of the bis(THF) unit in naturally occurring asimilobin should be corrected.

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