Cas 104858-58-4,(Z)-5-(4-Nitro-phenyl)-3-oxo-pent-4-enoic acid ethyl ester

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Check Digit Verification of cas no

The CAS Registry Mumber 104858-58-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,8,5 and 8 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 104858-58:
(8*1)+(7*0)+(6*4)+(5*8)+(4*5)+(3*8)+(2*5)+(1*8)=134
134 % 10 = 4
So 104858-58-4 is a valid CAS Registry Number.

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104858-58-4Relevant academic research and scientific papers

ANIONIC ACTIVATION OF STABILIZED YLIDES. A HIGHLY Z-STEREOSELECTIVE WITTIG REACTION OF (3-ETHOXYCARBONYL-2-OXOPROPYLIDENE)TRIPHENYLPHOSPHORANE WITH ALIPHATIC ALDEHYDES

Pietrusiewicz, K. Michal,Monkiewicz, Jaroslaw

, p. 739 - 742 (2007/10/02)

Reaction of stabilized ylide 1 with carbonyl partners can be promoted via anionic activation of the ylide; the presence of charge is responsible for the high Z-selectivity in the direct formation of conjugated enones.

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