RR OAc R'0-cyanopropionate, two compounds which might be expected to eliminate under the reaction conditions.(b) a,@-Unsaturated Nitriles. These compounds are obtained by treatment of primary allylic nitro compounds with phosphorus trichloride in pyridine at room temperature. The yields are modest, but the procedure allows the preparation of a relatively unstable y-functionalized a $-unsaturated nitrile.(c) Cyanohydrin Acetates. Treatment of P- ...