171754-12-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 171754-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,7,5 and 4 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 171754-12:
(8*1)+(7*7)+(6*1)+(5*7)+(4*5)+(3*4)+(2*1)+(1*2)=134
134 % 10 = 4
So 171754-12-4 is a valid CAS Registry Number.
171754-12-4Relevant articles and documents
Novel and Efficient Synthesis of 1β-Methylcarbapenems Utilizing Cyclization of Hypervalent Iodonium Ylides
Kume, Masaharu,Kubota, Tadatoshi,Iso, Yasuyoshi
, p. 8043 - 8046 (1995)
1β-Methylcarbapenems were efficiently synthesized utilizing acid- and rhodium(II)-catalyzed cyclization of iodonium ylide intermediates, which were easily prepared from the corresponding β-keto ester derivatives.