142232-51-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142232-51-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,2,3 and 2 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 142232-51:
(8*1)+(7*4)+(6*2)+(5*2)+(4*3)+(3*2)+(2*5)+(1*1)=87
87 % 10 = 7
So 142232-51-7 is a valid CAS Registry Number.
142232-51-7Relevant articles and documents
N-amides, Versatile Amidoalkylation Reagents. Part 4 A New Synthetic Route to 4H-1,3-Oxazines
Katritzky, Alan R.,Pernak, J.,Fan, Wei-Qiang
, p. 114 - 118 (2007/10/02)
A variety of 2,4,6-tri- and 2,4,5,6-tetrasubstituted 4H-1,3-oxazines (7a-i) were synthesized in excellent yields by the reaction of acetylenes (5) in the presence of aluminum chloride with N-amides 4, themselves readily prepare
