Synthesis of Functionalized Nitriles by Microwave-Promoted Fragmentations of Cyclic Iminyl Radicals

The synthesis of functionalized nitriles via microwave-promoted radical fragmentations of cyclic O-phenyl oxime ethers is reported. A variety of radical traps can be employed, permitting the generation of diverse adducts via C-O, C-C, C-N, or C-X bond formation. Other salient features include a simple and practical protocol, very short reaction times, and the avoidance of metal catalysts and toxic cyanide reagents. The utility of this method is demonstrated by the ring-distortion of a steroid-derived substrate.