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221676-20-6

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221676-20-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221676-20-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,7 and 6 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221676-20:
(8*2)+(7*2)+(6*1)+(5*6)+(4*7)+(3*6)+(2*2)+(1*0)=116
116 % 10 = 6
So 221676-20-6 is a valid CAS Registry Number.

221676-20-6Relevant articles and documents

A tripartite asymmetric allylboration - Silicon tethered alkene ring closing metathesis - In situ ring opening protocol for the regiospecific generation of functionalized (E)-disubstituted homoallylic alcohols

Ahmed, Mahmood,Barrett, Anthony G. M.,Beall, Jennifer C.,Braddock, D. Christopher,Flack, Kevin,Gibson, Vernon C.,Procopiou, Panayiotis A.,Salter, Matthew M.

, p. 3219 - 3232 (2007/10/03)

Molybdenum carbene 6 catalyzed ring closing metathesis of (alkenyl)silyl ethers of homochiral allylic alcohols to afford 1,2-oxasilines which were elaborated in situ to give (E)-4-alkyl-1,2-disubstituted 3-buten-1-ol and (Z)-4-alkyl-4-silyl-1,2-disubstituted 3-buten-1-ol derivatives as single geometric isomers.

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