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Ketones chemistry

Since complete hydride abstraction by B(C6F5)3 from Bu3SnH has been observed,260 it is not surprising that the borane mediates hydrostannation reactions as well. Y. Yamamoto also reported the use of BfCfiFs) in the hydrostannation of alkynes the hydrostannane is generated in situ from silane in the presence of BtCgFsF.261 Furthermore, Maruoka et al. have reported B(C6F5)3 mediated hydrostannation of ketones, chemistry which is discussed in more detail in the next section. [Pg.64]

In a sense the discoveries of Wolff and Schrbter were ahead of their time, for over 20 years were to pass before convenient methods for the preparation of the diazo ketones became available. Hence, synthetic applications largely date from the early 1930s. Periodically since then a number of substantial reviews of the Wolff rearrangement have been published, testifying to the importance that the reaction has achieved in preparative organic chemistry. Diazo ketone chemistry has achieved modem commercial importance in the photolithography industry. ... [Pg.887]

An understanding of facial selection in aldehyde and ketone chemistry, the topic of this chapter, requires a knowledge of the reacting species and the mechanism for reaction. Addition to carbonyls can occur by a formally non-allowed [ j2-i- 2] pathway or by an electrophile- or nucleophile-driven mechanism (Fig. 6-1) [4]. [Pg.155]

Although most of the reactions in these sections are old ones, typical of either alcohol or aldehyde/ketone chemistry. a couple of new reagents are introduced. These mainly allow selective reactions to be carried out on the... [Pg.456]

The following aspects of fluoro-ketone chemistry are covered elsewhere in the text as indicated (i) reactions with phosphorus compounds (Qiapter 4, p. 259) (ii) transition-metal compoimds (Chapter 5, p. 308) (iii) reactions of tetrakis-(trifluoromethyl)allene with oxides of nitrogen (NzOa and Na04) and nitrosyl... [Pg.163]

The second and third steps in Fischer esterification are also completely analogous to parts of aldehyde or ketone chemistry. A molecule of alcohol acts as a nucleophile and adds to the carbonyl carbon of the protonated carbonyl group (Fig. 17.21). For a ketone, this addition is followed by deprotonation, and gives the hemiacetal for the acid, a somewhat more complicated intermediate with one more hydroxyl group is formed. In both reactions, however, a planar, hybridized carbon has been converted into an intermediate with a tetrahedral carbon, called the tetrahedral intermediate. [Pg.842]

Expanding the scope of enantioselective FerroRHANE-promoted [3+2] annula-tions with a,p-unsaturated ketones. Chemistry - A European Journal, 16,1033-1045. [Pg.305]

The resin matrix is usually a formulated thermoset system (i.e. a reactive matrix, which on the application of heat and pressure, chemically reacts to form an infusible reinforced laminate). The thermosetting matrices are most often based on epoxy chemistries although there are plenty of examples of phenolic, bismaleimide and polyimide matrices (for example, the HexPly range from Hexcel Composites) and a few where the resin is based on cyanate esters. Thermoplastic matrices are also encountered (i.e. matrices that can change from a solidus to a liquidus form by tbe application of heat and pressure and then revert to the solid state on cooUng) which are usually, but not exclusively, based on polysulphone, polyetbersulphone or polyether ether ketone chemistries. [Pg.245]

Skrypnik,Yu.G. Lyashchuk, S.N. Sulfur.Lett, 1994 vol. 17, No. 6, 287-294. Makarova, N.V. Zemtsova, M.N. Moiseev, l.K. Syntheses based on bromomethyl 1-adamantyl ketone. Chemistry of Heterocyclic Compounds, 1993 Vol. 29, Noll, 1366-1367. Translated from Khimiya Geterotsiklicheskikh Soedinenii, 1993 No. 11, 1580-1581. [Pg.90]

Paterson and Hulme applied the ethyl ketone chemistry to the total synthesis of ebelactones A 114 and B 115,... [Pg.223]

Meyer N, Lough AJ, Morris RH. Iron(II) complexes for the efficient catalytic asymmetric transfer hydrogenation of ketones. Chemistry 2009 15(22) 5605-5610. [Pg.955]

SuGA, T., T. Shishibori, K. Kotera, and R. Fujii The Biosynthesis of a Non-Head to Tail Monoterpene, Artemisia Ketone. Chemistry Letters 1972, 533. [Pg.208]


See other pages where Ketones chemistry is mentioned: [Pg.107]    [Pg.243]    [Pg.337]    [Pg.324]    [Pg.359]    [Pg.324]    [Pg.906]    [Pg.335]    [Pg.324]    [Pg.128]    [Pg.21]    [Pg.30]    [Pg.492]    [Pg.107]    [Pg.136]   
See also in sourсe #XX -- [ Pg.173 ]




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