81404-27-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81404-27-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,4,0 and 4 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81404-27:
(7*8)+(6*1)+(5*4)+(4*0)+(3*4)+(2*2)+(1*7)=105
105 % 10 = 5
So 81404-27-5 is a valid CAS Registry Number.
81404-27-5Relevant articles and documents
REACTIONS OF DIAZOALKANES AND MANNICH CONDENSATION WITH 5-ARYL-2-THIONO-1,3,4-OXADIAZOLES
Anwar, M.,El-Barbary, A. A.,Ghattas, A. A. G.,Hashem, A. F.
, p. 599 - 606 (2007/10/02)
5-Aryl-2-thiono-1,3,4-oxadiazoles (1) reacted with diphenyl diazomethane and diazofluorene forming compounds 2 and 3.Compounds 1 reacted with formaldehyde in presence of amines forming the corresponding Mannich bases, 6-10.
