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Oxidation With Chromium(VI)-amine Complexes
Oxidation with chromium(VI) complexes involves the conversion of alcohols to carbonyl compounds or more highly oxidized products through the action of molecular chromium(VI) oxides and salts. The principal reagents are Collins reagent, PDC, and PCC. These reagents represent improvements over inorganic chromium(VI) reagents such as Jones reagent. Inventory of Cr(VI)-pyridine and pyridinium reagents Cr(VI)-pyridine and pyridinium reagents have the advantage that they are soluble in organic solvents as are the alcohol substrates. One family of reagents employs the complex CrO3(pyridine)2. * Sarett's reagent: a solution of CrO3(pyridine)2 in pyridine. It was popularized for selective oxidation of primary and secondary alcohols to carbonyl compounds. * Collins reagent is a solution of the same CrO3(pyridine)2 but in dichloromethane. The Ratcliffe variant of Collins reagent relates to details of the preparation of this solution, i.e., the addition of chromium trioxide to a solution of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jones Reagent
Jones may refer to: People *Jones (surname), a common Welsh and English surname *List of people with surname Jones *Jones (singer), a British singer-songwriter Arts and entertainment * Jones (''Animal Farm''), a human character in George Orwell's novel ''Animal Farm'' * "Jones" (''Law & Order: Criminal Intent''), an episode of the TV series *Jones!, a New Zealand television channel *"Jones", a song from the album ''Certain Things Are Likely'' by Kissing the Pink Organisations *Jones Bootmaker, a UK-based footwear retailer *Jones Soda, a brand of soda pop *Jones Sewing Machine Company, a British manufacturer acquired by Brother Industries *L&F Jones, a British retail and hotel company Places *Jones, Ontario, Canada *Jones, Isabela, Philippines United States *Jones, Alabama *Jones, Illinois *Jones, Kentucky *Jones, Michigan *Jones, Oklahoma *Jones, West Virginia *Jones Township (other) Science and technology *Jones (Martian crater), an impact crater on Mars *Jones (unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moffatt Oxidation
Moffat is a former burgh and spa town in Dumfries and Galloway, Scotland. Moffat or Moffatt may also refer to: Places United States * Moffat, Colorado, a town * Moffat County, Colorado * Moffat Tunnel, a railroad tunnel in Colorado * Moffatt Township, Michigan * Moffat, Texas, an unincorporated community Elsewhere * Moffat Beach, Queensland, Australia * Mount Moffat, Antarctica * Moffat Hills, Scotland, a range of hills People * Moffat (surname), a list of people with the surname Moffat or Moffatt * Moffat (given name), a list of people with the given name Moffat or Moffatt * Clan Moffat, Scottish clan Arts and entertainment * The Moffatts, Canadian band * ''The Moffats'', a children's novel by Eleanor Estes * Irene Moffat, a character in the 1987 American fantasy comedy movie ''Harry and the Hendersons'' * Sarah Moffat, a fictional television character from ''Upstairs, Downstairs'' Other uses * Moffat (company), an appliance brand originally from Australia * Moffat Com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swern Oxidation
The Swern oxidation, named after Daniel Swern, is a chemical reaction whereby a primary or secondary alcohol is oxidized to an aldehyde or ketone using oxalyl chloride, dimethyl sulfoxide (DMSO) and an organic base, such as triethylamine. It is one of the many oxidation reactions commonly referred to as 'activated DMSO' oxidations. The reaction is known for its mild character and wide tolerance of functional groups. The by-products are dimethyl sulfide ((CH3)2S), carbon monoxide (CO), carbon dioxide (CO2) and—when triethylamine is used as base— triethylammonium chloride (Et3NHCl). Of the volatile by-products, dimethyl sulfide has a strong, pervasive odour and carbon monoxide is acutely toxic, so the reaction and the work-up needs to be performed in a fume hood. Dimethyl sulfide is a volatile liquid (B.P. 37 °C) with an unpleasant odour at even low concentrations. Mechanism The first step of the Swern oxidation is the low-temperature reaction of DMSO, 1a, formally as re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epoxidation
In organic chemistry, an epoxide is a cyclic ether () with a three-atom ring. This ring approximates an equilateral triangle, which makes it strained, and hence highly reactive, more so than other ethers. They are produced on a large scale for many applications. In general, low molecular weight epoxides are colourless and nonpolar, and often volatile. Nomenclature A compound containing the epoxide functional group can be called an epoxy, epoxide, oxirane, and ethoxyline. Simple epoxides are often referred to as oxides. Thus, the epoxide of ethylene (C2H4) is ethylene oxide (C2H4O). Many compounds have trivial names; for instance, ethylene oxide is called "oxirane". Some names emphasize the presence of the epoxide functional group, as in the compound ''1,2-epoxyheptane'', which can also be called ''1,2-heptene oxide''. A polymer formed from epoxide precursors is called an ''epoxy'', but such materials do not contain epoxide groups (or contain only a few residual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
