hydrogenchloride; anhydrous potassium trimethylsilanolate 1.)a) THF, RT, 18 h, 2.) toluene, reflux, 5 h; Yield given. Multistep reaction;

1: 1.) sodium ethoxide / 1.) RT, overnight, 2.) EtOH, RT, 48 h 2: 1.)a)potassium trimethylsilanolate, b) 1 N aq. HCl / 1.)a) THF, RT, 18 h, 2.) toluene, reflux, 5 h View Scheme

1: 1.) sodium ethoxide / 1.) RT, overnight, 2.) EtOH, RT, 48 h 2: 1.)a)potassium trimethylsilanolate, b) 1 N aq. HCl / 1.)a) THF, RT, 18 h, 2.) toluene, reflux, 5 h View Scheme

acetic acid T=20°C;