21053-66-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21053-66-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,5 and 3 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21053-66:
(7*2)+(6*1)+(5*0)+(4*5)+(3*3)+(2*6)+(1*6)=67
67 % 10 = 7
So 21053-66-7 is a valid CAS Registry Number.
InChI:InChI=1/C7H8O2/c1-2-3-6-4-5-7(8)9-6/h3-5H,2H2,1H3
21053-66-7Relevant academic research and scientific papers
METHYL 3-PHENYLSULPHONYL ORTHOPROPIONATE: AN EFFICIENT REAGENT FOR THE SYNTHESIS OF γ-LACTONES AND BUTENOLIDES
Carretero, Juan Carlos,Lombaert, Stephane De,Ghosez, Leon
, p. 2135 - 2138 (2007/10/02)
Treatment of methyl 3-phenylsulphonyl orthopropionate with n-BuLi gives the corresponding carbanion which reacts with aldehydes or ketones to yield β-phenylsulphonyl-γ-lactones.Base-catalysed elimination yields α,β or β,γ-butenolides.
