1: 61 percent / silver triflate, 2,4,6-collidine / toluene; nitromethane / 0.25 h / -25 °C 2: 1.) 90 percent aqu. acetic acid, 2.) 0.2 M sodium methoxide / 1.) reflux, 30 min, 2.) methanol, 3 h, room temperature View Scheme

1: 61 percent / silver triflate, 2,4,6-collidine / toluene; nitromethane / 0.25 h / -25 °C 2: 1.) 90 percent aqu. acetic acid, 2.) 0.2 M sodium methoxide / 1.) reflux, 30 min, 2.) methanol, 3 h, room temperature View Scheme