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77903-44-7

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77903-44-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77903-44-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,9,0 and 3 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 77903-44:
(7*7)+(6*7)+(5*9)+(4*0)+(3*3)+(2*4)+(1*4)=157
157 % 10 = 7
So 77903-44-7 is a valid CAS Registry Number.

77903-44-7Relevant articles and documents

ENANTIOSELECTIVE SYNTHESIS OF SILOXYCYCLOPROPANES AND OF γ-OXOCARBOXYLATES BY ASYMMETRIC CATALYSIS

Kunz, Thomas,Reissig, Hans-Ulrich

, p. 2079 - 2082 (1989)

Up to 48percent enantiomeric excess have been attained by cyclopropanation of silyl enol ethers with methyl diazoacetate in the presence of optically active Cu-catalysts.Subsequent ring opening of resulting siloxycyclopropanes gives γ-oxocarboxylates with

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