Esters dialkyl

Dialkyl Oxalates. Oxalic acid gives various esters. Dialkyl esters, ROOC—COOR, are industrially useful, but monoalkyl esters. 

Of the 3 possible types of peroxy carbonate esters-dialkyl monoperoxy carbonates, dialkyl diperoxycarbonates and dialkyl peroxydicarbonates-, the latter are by far the least stable group. Several of the 16 alkyl and substituted-alkyl esters prepared decomposed violently or explosively at temperatures only slightly above the temperature of preparation (0-10°C), owing to self-accelerating exothermic decomposition. Several were also explosive on exposure to heat, friction or shock [1], Amines and certain metals cause accelerated decomposition of dialkyl peroxydicarbonates by a true catalytic mechanism [2], Individually indexed compounds are ... 

The reaction can be extended to ot,ot-dihalo esters1557 and a,a-dihalo nitriles.1558 It is possible to replace just one halogen or both. In the latter case the two alkyl groups can be the same or different. When dialkylation is applied to dihalo nitriles, the two alkyl groups can be primary or secondary, but with dihalo esters, dialkylation is limited to primary R. Another extension is the reaction of boranes with -y-halo-a.p-unsaturated esters.1559 Alkylation takes place in the -y position, but the double bond migrates, e.g.,... 

Dialkyl Oxalates. Oxalic acid gives various esters, Dialkyl esters ROOC—COOR, are industrially useful, but monoalkyl esters, ROOC— COOH, are not The dialkyl esters are characterized by good solvent properties and serve as starting materials in the synthesis of many organic compounds, such as pharmaceuticals, agrochemicals, and fine chemicals (qv). Among die dieslers, dimethyl, diediyl. and di-n-butyloxalates are industrially important. 

R-P(0H)2[R-P(0)(H)0H] Phosphonous acid (alkylphosphonous acid esters dialkyl alkylphosphonite) phosphonige Satire... 

The cyano group in position 4 of quinazolines behaves like a halogen towards nucleophilic reagents and can be displaced by a hydroxide anion, alkoxides, amines, hydrazines, and various carbon nucleophiles, o.g. ketones, a-keto esters, dialkyl malonates, nitroalkanes, Gri-gnard reagents, and enamines, to give 4-substituted quinazolines 1. The cyano group of quin-azoline-2-carbonitriles is less reactive for nucleophilic substitution but its displacement has not been intensively studied. Alkaline or acid hydrolysis of quinazoline-4-carbonitriles affords quinazolin-4(3// )-oncs. ... 

The rp.action described is of considerable general utility for the preparation of benzoyloxy derivatives of unsaturated hydrocarbons. Reactions of /-butyl perbenzoate with various other classes of compounds in the presence of catalytic amounts of copper ions produce benzoyloxy derivatives. Thus this reaction can also be used to effect one-step oxidation of saturated hydrocarbons, - esters, dialkyl and aryl alkyl ethers, benzylic ethers, cyclic ethers, straight-chain and benzylic sul-fides, cyclic sulfides, amides, and certain organo-silicon compounds. ... 

RP(0)(0H)2 Phosphonic acid (alkylphosphonic acid esters dialkyl alkylphosphonate) Phosphonsatire... 

Miscellaneous Alkylating Agents. Noller and Dutton have studied the trialkyl phosphates as alkylation agents. They found that ethers are formed by using one equivalent of the trialkyl phosphate per mole of phenol. The 5delds of the ether in Table 14-1 are based on the amount of the alkyl radical available and hence are a measure of the relative alkylating ability of the various sulfate or phosphate esters. Dialkyl oxalates and ethyl-6-bromosorbate have also been used to alkylate phenol [Pg.818]

Synonyms Adipic acid, dialkyl (C7-C9) ester Dialkyl (C7-C9) adipate Hexanedioic acid, di-C7-9-branched and linear alkyl esters... 

LIPOPHILIC PRODRUGS Monoalkyl esters Dialkyl esters Aryl esters Phosphoramidates Phospholipid esters a-Acyloxyalkyl esters... 

Many representatives of the trialkyl orthophosphate ester, dialkyl alkyl (or aryl) phosphonate ester, alkyl dialkyl (or diaryl)-phosphinate, and trialkyl (or triaryl) phosphine oxide class have been investigated. Judging from the reviews available, none of the more exotic types appears to offer any particular advantage over tributyl orthophosphate as a selective extractant for resolving lanthanide mixtures. Most are either viscous liquids or solids that require a diluent, and for the most part the individual separation factors to be had are unspectacular. 

The action of methyl iodide and strong anhydrous base on 6j8-tritylaraino-penicillinates effects. S-alkylation and 1,2- bond rupture, to form the 1,2-seco-penicillins (114). With p-methoxybenzyl esters, dialkylation may occur, giving (115 t) as a product. ... 

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