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  2. 4-Bromofentanyl - Wikipedia

    en.wikipedia.org/wiki/4-Bromofentanyl

    4-Bromofentanyl (para-bromofentanyl) is an opioid analgesic drug that is an analog of fentanyl and has been sold as a designer drug, [1] first identified in Pennsylvania in the US in March 2020. [ 2 ]

  3. Category:Ketals - Wikipedia

    en.wikipedia.org/wiki/Category:Ketals

    In organic chemistry, a ketal is a functional group derived from a ketone by replacement of the carbonyl (C=O) group by two alkoxy groups. The IUPAC once declared the term "ketal" obsolete, but later accepted it as a subclass of acetals. Therefore, a ketal can also be defined as "an acetal derived from a ketone."

  4. Acetal - Wikipedia

    en.wikipedia.org/wiki/Acetal

    The term ketal is sometimes used to identify structures associated with ketones (both R groups organic fragments rather than hydrogen) rather than aldehydes and, historically, the term acetal was used specifically for the aldehyde-related cases (having at least one hydrogen in place of an R on the central carbon). [1]

  5. Phenacyl bromide - Wikipedia

    en.wikipedia.org/wiki/Phenacyl_bromide

    2-Bromoacetophenone α-Bromoacetophenone Bromomethyl phenyl ketone. Identifiers CAS Number. 70-11-1 ...

  6. Acetophenone - Wikipedia

    en.wikipedia.org/wiki/Acetophenone

    Acetophenone is formed as a byproduct of the cumene process, the industrial route for the synthesis of phenol and acetone.In the Hock rearrangement of isopropylbenzene hydroperoxide, migration of a methyl group rather than the phenyl group gives acetophenone and methanol as a result of an alternate rearrangement of the intermediate:

  7. Protecting group - Wikipedia

    en.wikipedia.org/wiki/Protecting_group

    Ethylene glycol protects a ketone (as an acetal) during an ester reduction, vs. unprotected reduction to a diol. A protecting group or protective group is introduced into a molecule by chemical modification of a functional group to obtain chemoselectivity in a subsequent chemical reaction. It plays an important role in multistep organic ...

  8. How California eco-bureaucrats halted a Pacific Palisades ...

    www.aol.com/news/california-eco-bureaucrats...

    The good news for the milkvetch plant is that they usually need wildfire to sprout — meaning dormant seeds now have a massive new habitat for a new crop of the rare shrub.

  9. Dioxolane - Wikipedia

    en.wikipedia.org/wiki/Dioxolane

    The ketal is produced by acid catalysed reaction with ethylene glycol, the reduction reaction carried out, and the protecting group removed by hydrolysis to produce 4-hydroxymethylcyclohexanone. NaBArF 4 can also be used for deprotection of acetal or ketal-protected carbonyl compounds.