137604-28-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137604-28-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,6,0 and 4 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 137604-28:
(8*1)+(7*3)+(6*7)+(5*6)+(4*0)+(3*4)+(2*2)+(1*8)=125
125 % 10 = 5
So 137604-28-5 is a valid CAS Registry Number.
137604-28-5Relevant academic research and scientific papers
SYNTHESIS OF CHIRAL INDOLIZINES AS BICYCLIC ERGOLINE ANALOGUES
Gmeiner, Peter
, p. 1499 - 1504 (2007/10/02)
An efficient synthesis of the enantiomerically pure aminoindolizine (3) by a triflic anhydride assisted cyclization of the 1,3-amino alcohol (6) is reported. 6 can be readily derived from L-asparagine (4) via the O-activated β-homoserine equivalent (7).
