228720-80-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 228720-80-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,8,7,2 and 0 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 228720-80:
(8*2)+(7*2)+(6*8)+(5*7)+(4*2)+(3*0)+(2*8)+(1*0)=137
137 % 10 = 7
So 228720-80-7 is a valid CAS Registry Number.
228720-80-7Relevant academic research and scientific papers
Chemo-enzymatic synthesis of chiral 3-hydroxy-azetidin-2-ones
Bari,Madan,Sethi
, p. 10 - 17 (2007/10/03)
n-Tributyltin hydride reduction of 3-acetoxy-4,4-bis(alkylthio)- azetidin-2-ones 4a and 4b produces 4-unsubstituted azetidinone 5 and 4- alkylthio-azetidin-2-one 9 respectively. Azetidin-2,3-diones 8,11,13 which can be conveniently prepared by basic hydro
