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957770-89-7

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957770-89-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 957770-89-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,5,7,7,7 and 0 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 957770-89:
(8*9)+(7*5)+(6*7)+(5*7)+(4*7)+(3*0)+(2*8)+(1*9)=237
237 % 10 = 7
So 957770-89-7 is a valid CAS Registry Number.

957770-89-7Relevant articles and documents

Mimicry of polyketide synthases - Enantioselective 1,4-addition reactions of malonic acid half-thioesters to nitroolefins

Lubkoll, Jana,Wennemers, Helma

, p. 6841 - 6844 (2008/09/17)

Bifunctionality is the key for mimicking the active site of polyketide synthases with synthetic metal-free organocatalysts (see picture). Cinchona alkaloid derivatives bearing both a basic site and a urea moiety catalyze conjugate enantioselective addition reactions of malonic acid half thioesters (MAHTs) to nitroolefins with up to quantitative yields and selectivities up to 90% ee. (Chemical Equation Presented).

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