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77632-78-1

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77632-78-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77632-78-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,6,3 and 2 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 77632-78:
(7*7)+(6*7)+(5*6)+(4*3)+(3*2)+(2*7)+(1*8)=161
161 % 10 = 1
So 77632-78-1 is a valid CAS Registry Number.

77632-78-1Relevant articles and documents

ENANTIOSELECTIVE SYNTHESIS OF (+)-α-ALLOKAINIC ACID BY ASYMMETRIC LEWIS ACID-MEDIATED INTRAMOLECULAR ENE REACTION

Oppolzer, W.,Robbiani, C.,Baettig, K.

, p. 1391 - 1400 (2007/10/02)

(+)-α-Allokainic acid ((+)-1) has been prepared for the ester of cis-β-chloroacrylic acid and (-)-8-phenylmenthol by a sequence of four synthetic operations.The crucial step 8d-14d (Scheme 4) is a 100percent diastereo- and 90percent enantioselective intramolecular ene reaction proceeding at -35 degC on treatment of 8d with Me2AlCl.Saponification of 14d regenerated the auxiliary chiral alcohol and yielded (+)-1 on subsequent decarboxylation.In the analogous cyclization 11d-15d the sense of asymmetric induction (78percent d.e.) was opposite as confirmed by the conversion of 15d to (-)-α-allokainic acid.

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