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  2. Buchner ring expansion - Wikipedia

    en.wikipedia.org/wiki/Buchner_ring_expansion

    The Buchner ring expansion reaction was first used in 1885 by Eduard Buchner and Theodor Curtius [1] [2] who prepared a carbene from ethyl diazoacetate for addition to benzene using both thermal and photochemical pathways in the synthesis of cycloheptatriene derivatives. The resulting product was a mixture of four isomeric carboxylic acids ...

  3. 2,4,6-Trinitrobenzoic acid - Wikipedia

    en.wikipedia.org/wiki/2,4,6-Trinitrobenzoic_acid

    Upon heating, 2,4,6-trinitrobenzoic acid undergoes decarboxylation to give 1,3,5-trinitrobenzene. [4] Reduction with tin gives 2,4,6-triaminobenzenoic acid, a precursor to phloroglucinol (1,3,5-trihydroxybenzene).

  4. Friedel–Crafts reaction - Wikipedia

    en.wikipedia.org/wiki/Friedel–Crafts_reaction

    In commercial applications, the alkylating agents are generally alkenes, some of the largest scale reactions practiced in industry.Such alkylations are of major industrial importance, e.g. for the production of ethylbenzene, the precursor to polystyrene, from benzene and ethylene and for the production of cumene from benzene and propene in cumene process:

  5. Decarbonylation - Wikipedia

    en.wikipedia.org/wiki/Decarbonylation

    Here decarbonylation accompanies the preparation of cyclopentadienyliron dicarbonyl dimer: 2 Fe(CO) 5 + C 10 H 12 → (η 5 −C 5 H 5) 2 Fe 2 (CO) 4 + 6 CO + H 2. Decarbonylation can be induced photochemically as well as using reagents such as trimethylamine N-oxide: Me 3 NO + L + Fe(CO) 5 → Me 3 N + CO 2 + LFe(CO) 4

  6. Diethynylbenzene dianion - Wikipedia

    en.wikipedia.org/wiki/Diethynylbenzene_dianion

    In organic chemistry, a diethynylbenzene dianion is an anion consisting of two ethynyl anions as substituents on a benzene ring. With the chemical formula C 6 H 4 C 2− 4, three positional isomers are possible, differing in the relative positions of the two substituents around the ring: ortho-diethynylbenzene dianion; meta-diethynylbenzene dianion

  7. Decarboxylation - Wikipedia

    en.wikipedia.org/wiki/Decarboxylation

    Decarboxylation is a chemical reaction that removes a carboxyl group and releases carbon dioxide (CO 2). Usually, decarboxylation refers to a reaction of carboxylic acids , removing a carbon atom from a carbon chain.

  8. Benzene - Wikipedia

    en.wikipedia.org/wiki/Benzene

    Benzene is an organic chemical compound with the molecular formula C 6 H 6. The benzene molecule is composed of six carbon atoms joined in a planar hexagonal ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atoms, benzene is classed as a hydrocarbon.

  9. Cumene process - Wikipedia

    en.wikipedia.org/wiki/Cumene_process

    The term stems from cumene (isopropyl benzene), the intermediate material during the process. It was invented by R. Ūdris and P. Sergeyev in 1942 (USSR), [1] and independently by Heinrich Hock in 1944. [2] [3] This process converts two relatively cheap starting materials, benzene and propylene, into two more valuable ones, phenol and acetone.