A process for the preparation of isoquinolines of the formula STR1 wherein R is methyl or benzyl and R' is phenyl, p-hydroxyphenyl or p-methoxyphenyl, by reacting a solution of an enamine of the formula STR2 wherein R and R' are as described above, in a hydrocarbon with an anhydrous solution of p-toluenesulphonic acid in toluene or xylene at an elevated temperature.
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(2008/06/13)
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