Reactions
3,374 reactions: 10 worked examples with a reagent table you can scale, 503 named reactions and 2,861 checked procedures from Organic Syntheses.
217–240 of 3,374
- Grieco eliminationElimination The Grieco elimination is an organic reaction describing the elimination reaction of an aliphatic primary alcohol through a selenide to a terminal alkene.
- Grieco three-component condensationCondensation The Grieco three-component condensation is an organic chemistry reaction that produces nitrogen-containing six-member heterocycles via a multi-component reaction of an aldehyde, a nitrogen component, such as aniline, and an electron-rich alkene.
- Griesbaum coozonolysisOxidation The Griesbaum coozonolysis is a name reaction in organic chemistry that allows for the preparation of tetrasubstituted ozonides (1,2,4-trioxolanes) by the reaction of O-methyl oximes with a carbonyl compound in the presence of ozone.
- Grignard reactionOrganometallic addition The Grignard reaction (French: [ɡʁiɲaʁ]) is an organometallic chemical reaction in which, according to the classical definition, carbon alkyl, allyl, vinyl, or aryl magnesium halides (Grignard reagent) are added to the carbonyl groups of either an aldehyde or ketone under anhydrous conditions.
- Grob fragmentation A Grob fragmentation is an elimination reaction that breaks a neutral aliphatic chain into three fragments: a positive ion spanning atoms 1 and 2 (the "electrofuge"), an unsaturated neutral fragment spanning positions 3 and 4, and a negative ion (the "nucleofuge") comprising the rest of the chain.
- Grundmann aldehyde synthesis The Grundmann aldehyde synthesis is a chemical reaction that produces an aldehyde from an acyl halide.
- Guerbet reaction The Guerbet reaction, named after Marcel Guerbet (1861–1938), is an organic reaction that converts a primary alcohol into its β-alkylated dimer alcohol with loss of one equivalent of water.
- Haber process The Haber process, also called the Haber–Bosch process, is the main industrial procedure for the production of ammonia.
- Haber–Weiss reaction The Haber–Weiss reaction generates •OH (hydroxyl radicals) from H2O2 (hydrogen peroxide) and superoxide (•O2−) catalyzed by iron ions.
- Hammick reaction The Hammick reaction, named after Dalziel Hammick, is a chemical reaction in which the thermal decarboxylation of α-picolinic (or related) acids in the presence of carbonyl compounds forms 2-pyridyl-carbinols.
- Hantzsch pyridine synthesis The Hantzsch pyridine synthesis or Hantzsch dihydropyridine synthesis is a multi-component organic reaction between an aldehyde such as formaldehyde, 2 equivalents of a β-keto ester such as ethyl acetoacetate and a nitrogen donor such as ammonium acetate or ammonia.
- Hantzsch pyrrole synthesis The Hantzsch Pyrrole Synthesis, named for Arthur Rudolf Hantzsch, is the chemical reaction of β-ketoesters (1) with ammonia (or primary amines) and α-haloketones (2) to give substituted pyrroles (3).
- Hass–Bender oxidationOxidation In organic chemistry, the Hass–Bender oxidation (also called the Hass–Bender carbonyl synthesis) is an organic oxidation reaction that converts benzyl halides into benzaldehydes using the sodium salt of 2-nitropropane as the oxidant.
- Hayashi rearrangementRearrangement The Hayashi rearrangement is the chemical reaction of ortho-benzoylbenzoic acids catalyzed by sulfuric acid or phosphorus pentoxide.
- Heck reactionCross-coupling The Heck reaction (also called the Mizoroki–Heck reaction) is the chemical reaction of an unsaturated halide (or triflate) with an alkene in the presence of a base and a palladium catalyst to form a substituted alkene.
- Heck–Matsuda reactionCross-coupling The Heck–Matsuda (HM) reaction is an organic reaction and a type of palladium catalysed arylation of olefins that uses arenediazonium salts as an alternative to aryl halides and triflates.
- Hegedus indole synthesis The Hegedus indole synthesis is a name reaction in organic chemistry that allows for the generation of indoles through palladium(II)-mediated oxidative cyclization of ortho-alkenyl anilines.
- Hell–Volhard–Zelinsky halogenationHalogenation The Hell–Volhard–Zelinsky halogenation reaction is a chemical transformation that transforms an alkyl carboxylic acid to the α-bromo derivative.
- Hemetsberger indole synthesis The Hemetsberger indole synthesis (also called the Hemetsberger–Knittel synthesis) is a chemical reaction that thermally decomposes a 3-aryl-2-azido-propenoic ester into an indole-2-carboxylic ester.
- Henry reaction The Henry reaction is a classic carbon–carbon bond formation reaction in organic chemistry.
- Herz reaction The Herz reaction, named after the chemist Richard Herz, is the chemical conversion of an aniline to the benzodithiazolium salt by its reaction with disulfur dichloride.
- Hexadehydro Diels–Alder reaction In organic chemistry, the hexadehydro-Diels–Alder (HDDA) reaction is an organic chemical reaction between a diyne (2 alkyne functional groups arranged in a conjugated system) and an alkyne to form a reactive benzyne species, via a [4+2] cycloaddition reaction.
- Hill reaction The Hill reaction is the light-driven transfer of electrons from water to Hill reagents (non-physiological oxidants) in a direction against the chemical potential gradient as part of photosynthesis.
- Hinsberg oxindole synthesis The Hinsberg oxindole synthesis is a method of preparing oxindoles from the bisulfite additions of glyoxal.
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