21987-32-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21987-32-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,8 and 7 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21987-32:
(7*2)+(6*1)+(5*9)+(4*8)+(3*7)+(2*3)+(1*2)=126
126 % 10 = 6
So 21987-32-6 is a valid CAS Registry Number.
21987-32-6Relevant academic research and scientific papers
The First Efficient Asymmetric Synthesis of 7-Oxabicyclohept-5-ene-2-carboxylate Derivatives
Takayama, Hiromitsu,Iyobe, Akira,Koizumi, Toru
, p. 771 - 772 (2007/10/02)
The asymmetric synthesis of 7-oxabicyclohept-5-ene-2-carboxylate derivatives was accomplished by the highly diastereoselective Diels-Alder reaction of (S)S- and (R)S-3-(2-pyridylsulphinyl)acrylates with furan.
