137303-80-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137303-80-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,3,0 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 137303-80:
(8*1)+(7*3)+(6*7)+(5*3)+(4*0)+(3*3)+(2*8)+(1*0)=111
111 % 10 = 1
So 137303-80-1 is a valid CAS Registry Number.
137303-80-1Relevant articles and documents
Asymmetric Diels-Alder Reactions. A Route to Chiral Carbocycles via Bicyclic Lactams
Busacca, Carl A.,Meyers, A. I.
, p. 2299 - 2316 (2007/10/02)
The L-valinol-derived unsaturated lactam methyl 3-isopropyl-7a-methyl-5-oxo-2,3-dihydro-7aH-pyrrolooxazole-6-carboxylate functions as an excellent chiral dienophile in asymmetric Diels-Alder reactions.Diene approach occurs exclusively from the α-(e
