Base-induced cyclization of trimethoxy-o-aroyldiphenylphosphoryl methylbenzamide: a formal synthesis of (±) cherylline and (±) cherylline dimethylether
The trimethoxy-o-aroyldiphenylphosphorylmethylbenzamide 9 can be cyclized by treatment with KHMDS; the procedure has been employed to synthesize (±)Cherylline 1 and its dimethylether 2.