1: Methyltriphenylphosphonium bromide With potassium tert-butylate in tetrahydrofuran 0.166667 h; 2: 2-allyl-3-ethoxy-4-methoxybenzaldehyde in tetrahydrofuran Wittig reaction;

1.1: 88 percent / K2CO3 / acetone 2.1: K2CO3 / acetone 3.1: potassium tert-butoxide / tetrahydrofuran / 0.17 h 3.2: 80 percent / tetrahydrofuran View Scheme

1.1: K2CO3 / acetone 2.1: potassium tert-butoxide / tetrahydrofuran / 0.17 h 2.2: 80 percent / tetrahydrofuran View Scheme

1.1: K2CO3 / acetone 2.1: potassium tert-butoxide / tetrahydrofuran / 0.17 h 2.2: 80 percent / tetrahydrofuran View Scheme