197307-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 197307-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,3,0 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 197307-20:
(8*1)+(7*9)+(6*7)+(5*3)+(4*0)+(3*7)+(2*2)+(1*0)=153
153 % 10 = 3
So 197307-20-3 is a valid CAS Registry Number.
197307-20-3Relevant articles and documents
Carbonylation of Alkynyl Epoxides: Synthesis of 5-Hydroxy-2,3-dienoate Esters and 2,3-Dihydrofuran-3-ol Derivatives
Piotti, Marcelo E.,Alper, Howard
, p. 8484 - 8489 (2007/10/03)
The carbonylation of alkynyl oxiranes catalyzed by (MePh2)4Pd in the presence of 20 atm of carbon monoxide in methanol gives methyl 5-hydroxy-2,3-pentadienoates in good yields. When the reaction is performed on alkynyl oxiranemethano
