133972-59-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133972-59-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,9,7 and 2 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 133972-59:
(8*1)+(7*3)+(6*3)+(5*9)+(4*7)+(3*2)+(2*5)+(1*9)=145
145 % 10 = 5
So 133972-59-5 is a valid CAS Registry Number.
133972-59-5Relevant academic research and scientific papers
Synthesis of trans-4-alkenyloxazoles
Zhao,Scarlato,Armstrong
, p. 1609 - 1612 (2007/10/02)
Oxazoles with trans-4-alkenyl substituents were synthesized using a Wittig condensation of the corresponding tri-n-butylphosphonium ylids with aldehydes. The resulting 4-alkenyloxazoles were obtained with greater than 95% trans selectivity.
