Free radical annulation in the synthesis of bicyclic .beta.-lactams. 4. Exo vs. endo cyclizations in the construction of the (.+-.)-1-oxacepham and (.+-.)-1-oxahomocepham systems
Free radical annulation in the synthesis of bicyclic .beta.-lactams. 4. Exo vs. endo cyclizations in the construction of the (.+-.)-1-oxacepham and (.+-.)-1-oxahomocepham systems
作者:Mario D. Bachi、Felix Frolow、Christian Hoornaert