In an example of the Beckmann rearrangement, cycloÂ·hexane reacts with hydroxylÂ·amine and acid to form caproÂ·lactam through this type of reaction.
This type of modi cation occurs through the addition of ethyl diÂ·azoÂ·acetate to benzene in the Buchner reaction. Pyridine derivatives are produced through this type of reaction with the use of diÂ·chloroÂ·carbene in the Ciamician-Dennstedt (chah-MEE-chee-an DENN-shtet) rearrangement. It's not a reduction, but the expulsion of nitrogen gas following treatment with nitrous acid drives this type of reaction in the Ti feneau-Demjanov (TIFF-eh-"no" DEM-yah-no f) rearrangement. The opposite of this type of reaction occurs when certain alpha-haloÂ·ketones are reacted with sodium hydroxide in the Favorskii rearrangement. In an example of the Beckmann rearrangement, cycloÂ·hexane reacts with hydroxylÂ·amine and acid to form caproÂ·lactam through this type of reaction. In mass spec, it leads to the formation of the tropylÂ·ium cation from a benzyl group. It's not oxidation, but in the Baeyer-Villiger ("buyer"-vill-ig-er) rearrangement, cyclic ketones treated with mCPBA undergo this process to form lactones. For 10 points, name this type of rearrangement in which a cyclic system increases in size.
This type of modi cation occurs through the addition of ethyl diÂ·azoÂ·acetate to benzene in the Buchner reaction.
ring expansion [prompt on ring formation; prompt on rearrangement before mention; anti prompt on speci c answers such as "forming an [n]-membered ring"]