127643-71-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 127643-71-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,6,4 and 3 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 127643-71:
(8*1)+(7*2)+(6*7)+(5*6)+(4*4)+(3*3)+(2*7)+(1*1)=134
134 % 10 = 4
So 127643-71-4 is a valid CAS Registry Number.
127643-71-4Relevant articles and documents
SYNTHESIS OF 1-OXABICYCLIC β-LACTAM PRECURSORS FROM 4,6-O-BENZYLIDENE-D-ALLAL
Kaluza, Zbigniew,Chmielewski, Marek
, p. 7195 - 7200 (2007/10/02)
Cycloaddition of trichloroacetyl isocyanate to 4,6-O-benzylidene-D-allal 4 followed by N-deprotection of the adduct produces β-lactam 9 with a good yield.Subsequent N-benzylation, 4,6-O-deprotection by hydrogenolysis, and a glycolic cleavage of the vic di
