(organic chemistry) Synonym of Schmidt reaction

(organic chemistry) The (normally reversible) thermal isomerization of a 1,5-diene to yield a more stable regioisomer

(organic chemistry) A powerful carbon–carbon bond-forming chemical reaction, in which the heating of an allyl vinyl ether initiates a [3,3]-sigmatropic rearrangement to give a γ,δ-unsaturated carbonyl.

(organic chemistry) A rearrangement name reaction in which an organosilyl group switches position with a hydroxyl proton over a carbon-to-oxygen covalent bond under the influence of a base, yielding a silyl ether.

(informal, figuratively) To punch someone in the face.

(organic chemistry) A reaction that converts a geminal dihalo cyclopropane to an allene using an organolithium base.

(chemistry) A rearrangement of an oxime functional group to substituted amides. It has also been successfully performed on haloimines and nitrones. Cyclic oximes and haloimines yield lactams.

(military) An offensive action by a rearguard. / (figuratively) A desperate attempt to forestall the inevitable.