abstract |
Process for the preparation of the isoquinolines of the formula wherein R is methyl or benzyl and Rʹ is phenyl, p-hydroxyphenyl or p-methoxyphenyl, characterized in that a solution of an enamine of the formula where R and Rʹ have the above meaning, in a hydrocarbon with an anhydrous solution of p-toluenesulfonic acid in toluene or xylene at elevated temperature. |