137195-49-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137195-49-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,1,9 and 5 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 137195-49:
(8*1)+(7*3)+(6*7)+(5*1)+(4*9)+(3*5)+(2*4)+(1*9)=144
144 % 10 = 4
So 137195-49-4 is a valid CAS Registry Number.
137195-49-4Relevant academic research and scientific papers
An Improved Method for the Synthesis of Cyclopropyl Ketoesters
Rai, K. M. Lokanatha,Anjanamurthy, C.,Radhakrishna, P. M.
, p. 1273 - 1277 (2007/10/02)
A simple and versatile method for the synthesis of cyclopropyl ketoesters starting from chalcones and ethyl cyanoacetate in benzene using sodium powder as base is described.
