Indole derivatives. 135. 5-[2-(4-Methoxyphenyl)ethenyl]indolines and indoles

5-[2-(4-Methoxyphenyl)ethenyl]indolines were obtained from 5-formyl-1-methyl- or 5-forrayl-1-benzylindolines by the Witting reaction with 4-methoxybenzylidenetriphenylphosphorane. Their dehydrogenation led to the formation of the corresponding compounds of the indole series. The corresponding hydroxy compounds were obtained by demethylation of the methoxyindole with boron tribromide and were converted into the acetoxy derivatives of indoline and indole.