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1237740-96-3

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1237740-96-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1237740-96-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,7,7,4 and 0 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1237740-96:
(9*1)+(8*2)+(7*3)+(6*7)+(5*7)+(4*4)+(3*0)+(2*9)+(1*6)=163
163 % 10 = 3
So 1237740-96-3 is a valid CAS Registry Number.

1237740-96-3Downstream Products

1237740-96-3Relevant articles and documents

Synthesis of substituted chromanones: An organocatalytic aldol/oxa-michael reaction

Butler, Jeffrey D.,Conrad, Wayne E.,Lodewyk, Michael W.,Fettinger, James C.,Tantillo, Dean J.,Kurth, Mark J.

supporting information; experimental part, p. 3410 - 3413 (2010/09/05)

(Equation Presented). A diastereoselective organocatalytic aldol/oxa-Michael reaction has been developed to efficiently deliver medicinally relevant 2,3-ring-substituted chromanones. Development of this synthetic strategy revealed an unexpected kinetic anti-Saytzeff elimination; an origin for the observed selectivity is suggested on the basis of the results of quantum chemical calculations. This unusual kinetic selectivity necessitated an isomerization protocol that in turn led to the discovery of an intriguing Pd-mediated isomerization/intramolecular Friedel-Crafts-type alkylation.

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