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109087-70-9

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109087-70-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109087-70-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,0,8 and 7 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 109087-70:
(8*1)+(7*0)+(6*9)+(5*0)+(4*8)+(3*7)+(2*7)+(1*0)=129
129 % 10 = 9
So 109087-70-9 is a valid CAS Registry Number.

109087-70-9Relevant articles and documents

Stereocontrolled Synthesis of Highly Oxygenated Acyclic Systems via the Enolate Claisen Rearrangement of O-Protected Allylic Glycolates

Gould, Thomas J.,Balestra, Michael,Wittman, Mark D.,Gary, Jill A.,Rossano, Lucius T.,Kallmerten, James

, p. 3889 - 3901 (1987)

Enolate Claisen rearrangement of E- and Z-allylic glycolates yields the syn- and anti-2-alkoxy-3-alkyl 4-enoates, respectively, in good yields (60-90percent) and with high internal diastereoselectivity.Incorporation of the glycolate Claisen procedure into an iterative sequence consisting of Claisen rearrangement and homologation by addition of vinyl nucleophiles results in the efficient, stereocontrolled generation of remotely functionalized, highly oxygenated acyclic systems.This strategy is demonstrated in stereoselective syntheses of pine sawfly pheromone 42 and tocopherol side-chain intermediate 30.

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