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1185881-93-9

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1185881-93-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1185881-93-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,8,5,8,8 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1185881-93:
(9*1)+(8*1)+(7*8)+(6*5)+(5*8)+(4*8)+(3*1)+(2*9)+(1*3)=199
199 % 10 = 9
So 1185881-93-9 is a valid CAS Registry Number.

1185881-93-9Relevant articles and documents

Functionalization of Csp3-H bond-Sc(OTf)3-catalyzed domino 1,5-hydride shift/cyclization/Friedel-Crafts acylation reaction of benzylidene Meldrum's acids

Mahoney, Stuart J.,Moon, David T.,Hollinger, Jon,Fillion, Eric

supporting information; experimental part, p. 4706 - 4709 (2011/03/18)

Under Sc(OTf)3 catalysis, benzylidene Meldrum's acids bearing a tethered p-methoxyphenethyl group were observed to undergo a [1,5]-hydride shift/cyclization at room temperature, representing a mild Csp3-H bond functionalization. The resulting spiro Meldrum's acid intermediates then underwent intramolecular Friedel-Crafts acylation, completing the one-pot, domino reaction. The reported protocol generates the 6-6-5-6 tetracyclic core of tetrahydrobenzo[b]fluoren-11-ones.

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