30841-93-1 Usage
Synthesis
Combination of HBr and AlBr3 would be expected to give a super-acid
(H+ AIBq-) and we might anticipate that this would provide a very powerful brominating
agent. Indeed it has been shown that tetrafluoropyrazine (which is less basic than
pentafluoropyridine) gives tetrabromopyrazine on treatment with H+ AlBr4-, therefore,
we expected that H+ AIBq- would react well with (3). This proved to be the case and
reaction of pentafluoropyridine with H+ AIBq- gave 2,4,6-tribromo-3,5-difluoropyridine
as a single product in high yield.
Check Digit Verification of cas no
The CAS Registry Mumber 30841-93-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,0,8,4 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 30841-93:
(7*3)+(6*0)+(5*8)+(4*4)+(3*1)+(2*9)+(1*3)=101
101 % 10 = 1
So 30841-93-1 is a valid CAS Registry Number.
InChI:InChI=1/C7H11F6N/c1-3-14(4-2)7(12,13)5(8)6(9,10)11/h5H,3-4H2,1-2H3
30841-93-1Relevant articles and documents
Multi-substituted heterocycles
Benmansour,Chambers,Hoskin,Sandford
, p. 133 - 137 (2007/10/03)
Pentafluoropyridine was used as the starting material for the preparation of a range of pyridine derivatives that bear five different substituents. In this context, syntheses of penta-functional pyridine systems by sequences of nucleophilic aromatic substitution, palladium catalysed coupling and bromo-lithiation processes are described.