Editing Organic reaction (section)

==Fundamentals==
Factors governing organic reactions are essentially the same as that of any [[chemical reaction]]. Factors specific to organic reactions are those that determine the stability of reactants and products such as [[Conjugated system|conjugation]], [[hyperconjugation]] and [[aromaticity]] and the presence and stability of [[reactive intermediate]]s such as [[radical (chemistry)|free radical]]s, [[carbocation]]s and [[carbanion]]s.

An organic compound may consist of many [[isomer]]s. Selectivity in terms of [[regioselectivity]], [[diastereoselectivity]] and [[enantioselectivity]] is therefore an important criterion for many organic reactions. The [[stereochemistry]] of [[pericyclic reaction]]s is governed by the [[Woodward–Hoffmann rules]] and that of many [[elimination reaction]]s by  [[Zaitsev's rule]].

Organic reactions are important in the production of [[Medication|pharmaceutical]]s. In a 2006 review,<ref>''Analysis of the reactions used for the preparation of drug candidate molecules'' John S. Carey, David Laffan, Colin Thomson and Mike T. Williams Org. Biomol. Chem., '''2006''', 4, 2337–2347, {{doi|10.1039/b602413k}}</ref> it was estimated that 20% of chemical conversions involved [[alkylation]]s on nitrogen and oxygen atoms, another 20% involved placement and removal of [[protective group]]s, 11% involved formation of new [[carbon–carbon bond]] and 10% involved [[functional group interconversion]]s.