1.5- Pentanedioic acid dimethyl ester

Figure 11.1 Py/methylation GC/MS chromatograms of lead white pigmented linseed oil paint after 610 °C Curie point pyrolysis assisted with on line methylation using 2.5% methanolic TMAH (the sample and TMAH solution was applied onto a rotating Curie point wire pyrolysis time 6 s, interface 180°C). 1, heptenoic acid, methyl ester 2, heptanoic acid, methyl ester 3, butenedioic acid, dimethyl ester 4, butanedioic acid, dimethyl ester 5, octenoic acid, methyl ester 6, octanoic acid, methyl ester 7, pentenedioic acid, dimethyl ester 8, pentanedioic acid, dimethyl ester 9, nonanoic acid, methyl ester 10, hexanedioic acid, dimethyl ester 11, decanoic acid, methyl ester 12, heptanedioic acid, dimethyl ester 13, octanedioic acid, dimethyl ester 14, 1,2 benzenedicarboxylic acid, dimethyl ester 15, a methyl octanedioic acid, dimethyl ester 16, nonanedioic acid, dimethyl ester 17, a methoxy octanedioic acid, dimethyl ester 18, a methyl nonanedioic acid, dimethyl ester 19, a,a dimethyl nonenedioic acid, dimethyl ester 20a, a methyl nonenedioic acid, dimethyl ester 20b, a,a dimethyl nonanedioic acid, dimethyl ester 21, decanedioic acid, dimethyl ester 22, a methoxy nonanedioic acid, dimethyl ester 23, a methyl decan edioic acid, dimethyl ester 24, undecanedioic acid, dimethyl ester 25, a methoxy decan edioic acid, dimethyl ester 26, pentadecanoic acid, methyl ester 27, dodecanedioic acid, dimethyl ester 28, hexadecanoic acid, methyl ester 29, heptadecanoic acid, methyl ester 30, octadecanoic acid, methyl ester 31,8 methoxy 9 octadecenoic acid, methyl ester 32, 11 methoxy 9 octadecenoic acid, methyl ester 33, 9 methoxy 10 octadecenoic acid and 10 methoxy 8 octadecenoic acid 34, 9 oxo octadecanoic acid, 10 oxo octadecanoic acid 35, 9 epoxy octadecanoic acid 36, eicosanoic acid, methyl ester 37, 9,10 dimethoxy octadecanoic acid, methyl ester 38, docosanoic acid, methyl ester. Reprinted from J. Anal. Appl. Pyrol., 61, 1 2, van den Berg and Boon, 19, Copyright 2001, with permission from Elsevier...

HAT)ROXY-2-PENTANEDIOIC ACID, DIMETHYL ESTER, DIMETHYL PHOSPHATE see SOYOOO... 

Some of the peak assignments in Tabie 6.7.20 are tentative because the mass spectra of many compounds in poiy(methyi methacrylate) pyrolysate are not available in the commercial mass spectral libraries. For example, 2-methylene-4,4-dimethyl-pentanedioic acid dimethyl ester (MW = 200) and 2,4,4 frimethyl-2-pentenedioic acid dimethyl ester (MW = 200) were assigned based on the mass spectra shovm in Figures 6.7.28 a and 6.7.28 b. 

Hydroxy-2-pentanedioic Acid, Dimethyl Ester, A161 Industrial 152... 

AI3-06026 DBE 5 Dimethyl giutarate Dimethyl pentanedioate EINECS 214-277-2 Glutaric acid, dimethyl ester HSDB 5789 NSC 58578 Pentanedioic acid, dimethyl ester. Liquid mp = -42.5° bp = 214°, bp2i = 109° d = 1.0876 soluble in CHCI3. very soluble in EtOH, Et20. 

To a solution of 431 mg methyl acrylate (5 mmol) in 2 mL dioxane was added 0.5 mmol tri-isobutyl proazaphosphatranes in the same solvent by syringe. The mixture was stirred at room temperature for 3 h, then the solvent was removed under vacuum. The residue was purified by column chromatography using EtOAc/hexanes (1 4) as eluent to afford 82.8% 2-methylene-pentanedioic acid dimethyl ester. 

Synonyms Dimethyl pentanedioate Pentanedioic acid, dimethyl ester... 

CAS 1119-40-0 EINECS/ELINCS 214-277-2 Synonyms Dimethyl pentanedioate Pentanedioic acid, dimethyl ester Empiricai C7H12O4 Formuia CH30C0(CH2)3C00CH3 Properties Colorless liq. sol. in oxygenated soivs. m.w. 160.17 dens. 1.087 (20/4 C) m.p. -42 C b.p. 230 C flash pt. 97 C ref. index 1.424 (20 C) Uses Solvent for coatings, cleaners, inks, textile lubricants, urethane prod. plasticizer for flexible thermoset polyester polymer intermediate for polyester polyols for urethanes, wet-str. paper resins, polyester resins antistat specialty chemical... 

C8H14 04 3-methyl-pentanedioic acid dimethyl ester 19013-37-7... 

C21H40O4 2-tetradecyl-pentanedioic acid dimethyl ester 29238-07-1... 

The application of 3-aminopropyl phosphine (3) [41,46] as a building block for incorporation into -COOH functionalized frameworks provides an excellent example of the utility of preformed primary phosphine frameworks (Scheme 8) [46]. The reactions involved Michael addition of ferf-butyl acrylate to malonic acid dimethyl ester to produce the intermediate adduct, 2-methoxycarbonyl-pentanedioc acid 5-ferf-butyl ester 1-methyl ester, which upon treatment with trifluro-acetic acid (TFA) produced the corresponding diester acid,2-methoxy-carbonyl-pentanedioic acid 1-methyl ester, in near quantitative yield. It is remarkable to note that the reaction of NH2(CH2)3PH2 (3) with the diester acid is highly selective as the -COOH group remained unattacked whereas the reaction occurred smoothly and selectively at the -COOMe groups to pro-... 

C11H20 04 3,3-dimethyl-pentanedioic acid diethyl ester ... 

Pentanedioic acid, 3-methyl-2-(phenyl-methyl)-, dimethyl ester, cobalt complex, 26 197... 

What makes this mixed Claisen condensation feasible Although both diesters possess a-hydrogens and can therefore give rise to enolate ions upon treatment with base, the first (dimethyl substituted) ester will not undergo successful condensation with a second identical molecule, because the product will lack the necessary additional a-hydrogen that needs to be removed to drive the equilibrium forward. Thus, this diester may be used in excess and will participate only as the carbonyl partner in reaction with enolate ions derived from the pentanedioate. Reaction of the ester mixture with excess ethoxide in ethanol, followed by treatment with aqueous acid, gives rise to the desired product. 

---