20272-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20272-21-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,7 and 2 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20272-21:
(7*2)+(6*0)+(5*2)+(4*7)+(3*2)+(2*2)+(1*1)=63
63 % 10 = 3
So 20272-21-3 is a valid CAS Registry Number.
20272-21-3Relevant articles and documents
A Convenient Synthesis of 4-Thio-D-galactofuranose
Varela, Oscar,Cicero, Daniel,Lederkremer, Rosa M. de
, p. 1884 - 1890 (2007/10/02)
The synthesis of 4-thio-D-galactofuranose (15) and derivatives, starting from methyl α-D-glucopyranoside (1), is described.Esterification of 1 with N-benzoylimidazole afforded regioselectively methyl 2,3,6-tri-O-benzoyl-α-D-glucopyranoside (2c).Further su
