81659-56-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81659-56-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,5 and 9 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 81659-56:
(7*8)+(6*1)+(5*6)+(4*5)+(3*9)+(2*5)+(1*6)=155
155 % 10 = 5
So 81659-56-5 is a valid CAS Registry Number.
81659-56-5Relevant articles and documents
REGIOSELECTIVE ADDITIONS TO 3-(OXAZOLINYL)PYRIDINE WITH ORGANOLITHIUM REAGENTS
Meyers, A. I.,Natale, Nicholas R.
, p. 13 - 19 (2007/10/02)
Organolithium reagents have been found to add to the 4- or 6-position in pyridines depending on the nature of the oxazoline present.Thus, methoxy-containing oxazolines lead to the 4-addition product (>95percent), whereas hydroxy-containing oxazolines dire