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  2. Buchner ring expansion - Wikipedia

    en.wikipedia.org/wiki/Buchner_ring_expansion

    The Buchner ring expansion is a two-step organic C-C bond forming reaction used to access 7-membered rings. The first step involves formation of a carbene from ethyl diazoacetate , which cyclopropanates an aromatic ring.

  3. Büchner–Curtius–Schlotterbeck reaction - Wikipedia

    en.wikipedia.org/wiki/Büchner–Curtius...

    Initial steps in the Buchner–Curtius–Schlotterbeck reaction mechanism. The reaction is then completed either by the reformation of the carbonyl through an 1,2-rearrangement or by the formation of the epoxide. There are two possible carbonyl products: one formed by migration of R 1 (4) and the other by migration of R 2 (5). The relative ...

  4. BaleDoneen method - Wikipedia

    en.wikipedia.org/wiki/BaleDoneen_Method

    Similar to other protocols, the method tests for cholesterol levels, blood pressure, and diabetes mellitus, as well as factors not included in other current protocols, including systemic inflammation, vitamin D deficiency, insulin resistance, elevated levels of lipoprotein(a), and genetic risks, to identify potential root causes of arterial plaque.

  5. Cyclopropanation - Wikipedia

    en.wikipedia.org/wiki/Cyclopropanation

    Cyclopropanation is also stereospecific as the addition of carbene and carbenoids to alkenes is a form of a cheletropic reaction, with the addition taking place in a syn manner. For example, dibromocarbene and cis -2-butene yield cis -2,3-dimethyl-1,1-dibromocyclopropane, whereas the trans isomer exclusively yields the trans cyclopropane.

  6. Intramolecular reactions of diazocarbonyl compounds - Wikipedia

    en.wikipedia.org/wiki/Intramolecular_reactions...

    The reaction mechanism of decomposition of diazocarbonyl compounds with copper begins with the formation of a copper carbene complex. Evidence for the formation of copper carbenes is provided by comparison to the behavior of photolytically generated free carbenes [6] and the observation of appreciable enantioselectivity in cyclopropanations with chiral copper complexes. [7]

  7. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/projects/dying-to-be...

    It was not a shocking find — he knew others that use diapers as a form of punishment. Maia Szalavitz, a journalist who covers the treatment industry — most notably with her 2006 book, Help At Any Cost: How the Troubled-Teen Industry Cons Parents and Hurts Kids — said that coercive techniques are still seen as treatment. “Addiction is a ...

  8. Metal-catalyzed cyclopropanations - Wikipedia

    en.wikipedia.org/wiki/Metal-catalyzed_cyclopropa...

    Definitive mechanistic studies of rhodium-catalyzed cyclopropanation are lacking. However, the mechanism has been rationalized based on product distribution and stereoselectivity. [4] Attack of the diazo compound on the metal center generates a zwitterionic metal alkyl complex, which expels nitrogen gas to afford a metal carbene intermediate.

  9. Acyloin condensation - Wikipedia

    en.wikipedia.org/wiki/Acyloin_condensation

    The Dieckmann method is practical only for 5- to 8-membered rings (with modest yields for 7- and 8-membered). The Thorpe method is more easily modified via high dilution (e.g., 0.001 M in benzene/ether) to enable the synthesis of large rings, but 4-membered and 9- to 13-membered rings are still not accessible.

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