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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. 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.

  4. Büchner–Curtius–Schlotterbeck reaction - Wikipedia

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

    The Buchner–Curtius–Schlotterbeck reaction is the reaction of aldehydes or ketones with aliphatic diazoalkanes to form homologated ketones. [1] It was first described by Eduard Buchner and Theodor Curtius in 1885 [ 2 ] and later by Fritz Schlotterbeck in 1907. [ 3 ]

  5. Carbene - Wikipedia

    en.wikipedia.org/wiki/Carbene

    Carbene cyclopropanation Carbenes add to double bonds to form cyclopropanes , [ 14 ] and, in the presence of a copper catalyst , to alkynes to give cyclopropenes . Addition reactions are commonly very fast and exothermic , and carbene generation limits reaction rate.

  6. Diazo - Wikipedia

    en.wikipedia.org/wiki/Diazo

    As such they are used in cyclopropanation for example in the reaction of ethyl diazoacetate with styrene. [22] Certain diazo compounds can couple to form alkenes in a formal carbene dimerization reaction. Diazo compounds are intermediates in the Bamford–Stevens reaction of tosylhydrazones to alkenes, again with a carbene intermediate:

  7. FCC chair proposes cybersecurity rules in response to China's ...

    www.aol.com/news/fcc-chair-proposes-cyber...

    WASHINGTON (Reuters) -U.S. Federal Communications Commission Chairwoman Jessica Rosenworcel is proposing that communications service providers be required to submit an annual certification ...

  8. Dog Trainer Shares the Secret to Getting Puppies to Stop ...

    www.aol.com/dog-trainer-shares-secret-getting...

    If you have a puppy that bites, it can be very frustrating and even scary if you have small children at home, too. If you have a land shark at home, you're going to want to see this video that dog ...

  9. US FDA approves Ionis Pharma's genetic disorder drug - AOL

    www.aol.com/news/us-fda-approves-ionis-pharmas...

    A strict low-fat diet is the current first-line treatment for the condition. The disorder affects fewer than 5,000 people in the U.S., according to government data. "We don't see any hurdles on ...