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Quaternary products

Oiganometallic usage is shown in the piepaiation of titanium- oi vanadium-containing catalysts foi the polymerisation of styrene or butadiene by the reaction of dimethyl sulfate with the metal chloride (145). Free-radical activity is proposed for the quaternary product from dimethylaruline and dimethyl sulfate and for the product from l,l,4,4-tetramethyl-2-tetra2ene and dimethyl sulfate (146,147). [Pg.203]

The all-carbon quaternary products formed are highly functionalized with a nitro group, hydroxyl group, and an ester functionality (Scheme 20). Utility of these substrates are demonstrated in subsequent functionalization in to chiral (3-lactam 99b and a-methylcysteine 101, a key intermediate in the total syntheses of mirabazoles and thiangazole, natural products with antitumour and anti-HfV properties. [Pg.162]

Carboxymethylation of the octaamine with ferf-butylbromo acetate, followed by hydrolysis gives high yields of the octaacetic ligand 26. The carboxymethylation requires careful control of the stoichiometry and the reaction conditions. Otherwise, mixtures of quaternary products are formed. [Pg.14]

Printing with Direct Dyes is common only for inexpensive goods, because of the extended steaming time required and the limited wetfastness of the prints, even after treatment with cationic quaternary products [5, p. 514],... [Pg.360]

Naphthyridine with O-mesitylenesulfonylhydroxylamine gave the quaternary product, 1-amino-l, 8-naphthyridin-l-ium mesitylenesulfonate (11) (reactants, CH2Cl2, 20°C 72%), converted by benzoyl chloride into the zwitterionic product (12) (neat reactants, 90°C 60%).loO3,cf 1004 1028... [Pg.200]

With two nitrile groups, the delocalized anion is so stable that even a weak, neutral amine (tri-ethylamine) is sufficiently basic to deprotonate the starting material. Here double alkylation again takes place note that the electrophile is good at Sn2, and the solvent is dipolar and aprotic (DMSO and DMF have similar properties). The doubly alkylated quaternary product was formed in 100% yield. [Pg.666]

The similar dilute acid-catalyzed transformation of toxiferine I dichloride was investigated by Battersby and Hodson (84, 31), who isolated two crystalline quaternary products from the reaction mixture. One was shown to be identical with a quaternary alkaloid, provisionally called A8, which they had previously isolated (15) from S. toxifera bark... [Pg.540]

Pedersen T. F., Nielsen B., and Pickering M. (1991) Timing of Late Quaternary productivity pulses in the Panama Basin and implications for atmospheric CO2. Paleoceanography 6, 657-677. [Pg.3371]

Ruhlemann M., Frank M., Hale W., Mangini A., Multiza P., and Wefer G. (1996) Late Quaternary productivity changes in the western equatorial Atlantic evidence from h-normahzed carbonate and organic carbon accumulation rates. A/ar. Geol. 135, 127—152. [Pg.3372]

The addition of acyl hydrazides to (l,2-alkadiene)phosphonic diamides (325) yields the 1,2,3-diazaphospholidine 3-oxides (326). Interaction of the phospho-nite esters (327) (X = Cl or Br) with a,P-unsaturated carboxylic esters, nitriles, ketones, or related compounds, gives quaternary products which decompose in boiling benzene to produce the dihydrophospholes (328). ... [Pg.147]

Gadamer and Enoch (40) treated papaverine with ethyl chlorocarbonate and obtained a compound which they regarded as V-carbethox5dsopapav-erine (XX), formed by dehydrochlorination of an intermediate quaternary product. However, on the basis of their studies on the action of ethyl... [Pg.37]

Various phosphane-modified rhodium catalysts were tested in the hydroformylation reaction of unsaturated esters. Pronounced temperature dependence was observed on the regioselectivity and catalytic activity for these reactions and under the appropriate conditions, it was possible to obtain preferentially either linear or quaternary products (Equations 7.6 and 7.7) [38]. [Pg.168]


See other pages where Quaternary products is mentioned: [Pg.257]    [Pg.528]    [Pg.655]    [Pg.139]    [Pg.189]    [Pg.297]    [Pg.546]    [Pg.109]    [Pg.113]    [Pg.130]    [Pg.68]    [Pg.297]    [Pg.130]    [Pg.51]    [Pg.597]    [Pg.381]    [Pg.176]    [Pg.31]    [Pg.352]    [Pg.370]    [Pg.433]    [Pg.351]    [Pg.2502]   
See also in sourсe #XX -- [ Pg.283 ]




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