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228251-88-5

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228251-88-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 228251-88-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,8,2,5 and 1 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 228251-88:
(8*2)+(7*2)+(6*8)+(5*2)+(4*5)+(3*1)+(2*8)+(1*8)=135
135 % 10 = 5
So 228251-88-5 is a valid CAS Registry Number.

228251-88-5Relevant articles and documents

Transannular Diels-Alder studies on the asymmetric synthesis of (+)- maritimol

Toro, Andras,Lemelin, Charles-Andre,Preville, Patrice,Belanger, Guillaume,Deslongchamps, Pierre

, p. 4655 - 4684 (2007/10/03)

Assembly of 13-membered TCC macrocyclic trienes are described and their transannular Diels-Alder reaction are investigated as a model study for the asymmetric synthesis of the ABC-ring system of (+)-maritimol. Albeit the original expectations that the pro-3(S)- and 4(R)-functionalities induce perfect absolute and relative control in the strategic step has not been fully met, a position at pro-12(R) complying with these requirements is recognized.

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