138907-20-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138907-20-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,9,0 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 138907-20:
(8*1)+(7*3)+(6*8)+(5*9)+(4*0)+(3*7)+(2*2)+(1*0)=147
147 % 10 = 7
So 138907-20-7 is a valid CAS Registry Number.
138907-20-7Relevant academic research and scientific papers
Stereo- and regioselective metal salt-catalyzed alkynylation of 1,2-epoxides
Chini,Crotti,Favero,Macchia
, p. 6617 - 6620 (2007/10/02)
A simple, efficient, stereoselective, and highly regioselective method for the synthesis of β-hydroxyacetylenes by the direct opening of 1,2-epoxides with lithium acetylides in anhydrous THF, in the presence of metal salts, is described. This new method a
