Cas 137838-89-2,2-Pentenoic acid, 3,3'-[1,2-phenylenebis(oxy)]bis-, diethyl ester

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Check Digit Verification of cas no

The CAS Registry Mumber 137838-89-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,8,3 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 137838-89:
(8*1)+(7*3)+(6*7)+(5*8)+(4*3)+(3*8)+(2*8)+(1*9)=172
172 % 10 = 2
So 137838-89-2 is a valid CAS Registry Number.

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137838-89-2Relevant academic research and scientific papers

Synthesis of 1,3-Benzodioxoles, 1,3-Benzoxathioles and 1,3-Benzodithioles from Allenic Derivatives

Cabiddu, Salvatore,Cadoni, Enzo,Ciuffarin, Ennio,Fattuoni, Claudia,Floris, Costantino

, p. 1573 - 1580 (2007/10/02)

Benzo-condensed five-membered heterocyclic rings containing two heteroatoms have been synthesized starting from disubstituted benzenes and allenic derivatives.The structure of all products was corroborated by elemental analysis and ir and 1H nmr spectroscopy.

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