Formic esters

Chemical Designations - Synonyms Ethyl Formic Ester Ethyl Methanoate Formic Acid, Ethyl Ester Formic Ether Chemical Formula HCOOC Hj. 

On the other hand, 1,1,1-trisubstituted alkanes behave similarly to aldehydes, yielding pyrjdium salts (128) with identical substituents in positions 2 and 6. Thus, Dorofeenko and co-workers condensed 2 moles of acetophenone with 1 mole of benzotrichloride in the presence of perchloric acid obtaining 2,4,6-triphenjdpjTylium perchlorate with 1 mole of ethyl orthoformate, they obtained 2,6-diphenyl-pyrylium perchlorate (57) from o-hydroxyacetophenone, ortho-formic ester and perchloric acid, 4-ethoxybenzopyrylium perchlorate was formed. 

An analogous reaction was carried out with ter/-butyl alcohol to give the imidazolium carboxylate in 77% yield and the azido formic ester in 85% yield.[l37]... 

This observation implies the formation of the dioxolenium ion (VII) which can initiate polymerisation by the intermediacy of the ionic formic ester (VIII). This sequence of reactions is shown in reaction scheme (8) [15]. 

In general, esters of /3-keto-acids are formed from two molecules of ester, and /3-diketones from ester and ketone. The use of formic esters leads, in both cases, to hydro xymethylene compounds ... 

Synonyms AI3-00407 Areginal BRN 0906769 Caswell No. 443A EINECS 203-721-0 EPA pesticide chemical code 043102 Ethyl formic ester Ethyl methanoate FEMA No. 2434 Formic acid, ethyl ester Formic ether NSC 406578 UN 1190. 

Synonyms Formic ether ethyl methanoate ethyl formic ester... 

Serine is another of the amino acids which Erlenmeyer jun. synthesised in 19O2 from hippuric acid, and which he described in detail with Storp in 1904 by condensing formic ester and hippuric ester with sodium ethylate they obtained oxymethylene hippuric ester or formyl hippuric ester —... 

The addition of nitrenes leads predominantly to the closed [6,6] bridged isomers. The corresponding [5,6] bridged isomer is - if at all - formed only in small amounts, probably via a direct addition to the [5,6] bond [394]. Nitrenes have been generated by thermolysis of azido-formic esters [172,395 00], photolysis of aroyl azides [401] or aryl azide [402], elimination of O-4-nitrophenylsulfonylalkylhydroxamic acid [403] or reaction of amines with Pb(OAc)4 [404]. 

Azidoformic esters such as 342 react with Cgg in a [2-tl] addition (Scheme 4.70), if the temperature is high enough to induce the loss of nitrogen prior to addition, otherwise a [3-1-2] addition can be observed (Section 4.3.2) [172, 395, 397]. Typical conditions include heating of the mixture in solvents such as tetrachloroethane [395, 397, 398], chloronaphfhalene [397] or toluene [396] at 110-160 °C. These conditions also afford multiple addition products [172]. To avoid potential hazard during purification of the azido formiates, they were also generated in situ in one pot by the reaction of chloro-formic ester with sodium azide [396]. 

Homologation reactions on alcohols-formic esters produce a mixture of oxygenates rich in acetates suitable for use in gasoline with interesting antiknock and combustion properties. 

Formic esters homologation - Ruthenium catalysts based on [Ru(00)3X3] species are sole Group VXIX metal systems able to hydrogenate and homologate the formyl group of formic esters to methyl and acetyl derivatives without causing an extensive decarbonylation of the formyl moiety (eqs.7,8) (17). 

HRu(OO) X, produced by addition of suitable iodide promoters, i.e. OH3X or AIX3 + HPF5, in this case seems essential to the activation of the substrate and for the hydrogenation of the formyl moiety to methyl derivatives (Fig. 2). On the other hand, iodide promoters which act also as Lewis acids (i.e. AIX3) favour the formation of products derived from carbonylation and homologation of the alkyl part of the formic ester. 

A formyl group can be introduced by reacting the metallated acetylene (M = Li or MgX) with a NjN-disubstituted fonnamide or with a formic ester [84-86] ... 

The reaction of halogenotriphenylphosphonium halides (triphenyl-phosphine dihalides) with alcohols is a useful method for the synthesis of alkyl halides (see Section II,2b p. 239). It has been found88 that (alkoxymethylene)dimethyliminium halides are formed in the reactions of these reagents with alcohols in N,N-dimethylformamide a possible mechanism is shown. Hydrolysis of the (alkoxymethylene)-dimethyliminium halide intermediate affords a formic ester, whereas... 

In order to obviate the formation of a formic ester, the reaction of l,2 3,4-di-0-isopropylidene-a-D-galactopyranose (42) was performed in p-dioxane. The 6-chloro-6-deoxy derivative (45) was again obtained, but only in low yield the major product was assigned the novel structure of 6-0-(4,6-dichloro-l,3,5-triazin-2-yl)-l,2 3,4-di-0-isopropylidene-a-D-galactopyranose (54). 

ETHYL FORMATE Ethyl Formic Ester, Ethyl Methanoate, Formic Add, ethyl ester Flammable Liquid, II 2 3 0... 

The Action of Aliphatic Alcohols on Selenonaphthene-quinone.—When the quinone is boiled with the alcohol the corresponding formic ester is formed, which has the general formula... 

Reaction XIV. (b) Action of Magnesium Alkyl or Aryl Halide on Esters, Acyl Chlorides, and Acid Anhydrides. (C., 1901,1., 725 II., 622 1902, I., 1411.)—In all the above cases tertiary alcohols are obtained, except, of course, in the case of- formic esters when secondary alcohols are formed. Using esters, the reaction has a wide application, as the examples given below show the use of the acyl chlorides and anhydrides is only of theoretical interest. The reactions in all cases take the usual Grignard course. 

By condensing formic ester with other monocar-boxylic esters, aldehyde esters result, while by using oxalic ester, ketonic dibasic esters are formed ... 

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