1: 2.) sodium azide / 1.) water, 80 deg C, 2 h; 2.) water, acetic acid, r.t., 18 h 2: 88 percent / pyridine / CH2Cl2 / 18 h / Ambient temperature 3: 1.) K10 montmorillonite 2.) 1N NaOMe / 1.) benzene, reflux, 24 h; 2.) methanol, 6 h View Scheme

K10 montmorillonite; sodium methylate 1.) benzene, reflux, 24 h; 2.) methanol, 6 h; Yield given. Multistep reaction. Yields of byproduct given;