triethylamine in hexane T=60°C; 26 h;

triethylamine T=60°C; 15 h; other solvent or solvent mixture, other times, without 2,6-di-tert-butylphenol, other spirodienone; Product distribution;

triethylamine T=60°C; 15 h; other solvent or solvent mixture, other times, without 2,6-di-tert-butylphenol, other spirodienone; Product distribution;