189057-82-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 189057-82-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,0,5 and 7 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 189057-82:
(8*1)+(7*8)+(6*9)+(5*0)+(4*5)+(3*7)+(2*8)+(1*2)=177
177 % 10 = 7
So 189057-82-7 is a valid CAS Registry Number.
InChI:InChI=1/C16H16O3/c1-2-19-16(18)11-14(17)10-13-8-5-7-12-6-3-4-9-15(12)13/h3-9H,2,10-11H2,1H3
189057-82-7Relevant articles and documents
Acylation of Meldrum's acid with arylacetic acid imidazolides as a convenient method for the synthesis of 4-aryl-3-oxobutanoates
Shimkin,Shirinian,Mailian,Lonshakov,Gorokhov,Krayushkin
experimental part, p. 139 - 142 (2011/09/12)
C-Acylation of Meldrum's acid by (het)arylacetic acids in ethanol in the presence of 1,1′-carbonyldiimidazole leads to ethyl 4-(het)aryl-3- oxobutanoates in high yields.