Regio- and stereoselective α-halogenation of 2-aryl-1-methylsulfonyl-2,3-dihydroquinolin-4(1H)-ones
2-Aryl-1-methylsulfonyl-2,3-dihydroquinolin-4(1H)-ones are readily converted into the corresponding 2-aryl-3-iodo- and 2-aryl-3-bromo-1-methylsulfonyl-2,3-dihydroquinolin-4(1H)-ones using iodine in methanol and pyridinium perbromide in acetic acid, respectively. The reactions were found to be regios...
Saved in:
Published in | South African journal of chemistry Vol. 54; no. 1; pp. 60 - 68 |
---|---|
Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
South African Chemical Institute (SACI)
21.05.2001
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | 2-Aryl-1-methylsulfonyl-2,3-dihydroquinolin-4(1H)-ones are readily converted into the corresponding 2-aryl-3-iodo- and 2-aryl-3-bromo-1-methylsulfonyl-2,3-dihydroquinolin-4(1H)-ones using iodine in methanol and pyridinium perbromide in acetic acid, respectively. The reactions were found to be regioselective and stereoselective by 1H NMR spectroscopy, affording in all cases the 2,3-trans isomers. X-ray crystallography was also used to investigate the relative stereochemistry of these 3-halo derivatives. |
---|---|
ISSN: | 0379-4350 |