Abietic acid, methyl ester

Polyglycol 174-500 Poly (styrene glycol), mol. wt. 500 Polyglycol 174-750 Poly (styrene glycol), mol. wt. 750 Abalync Abietic acid, methyl ester... 

Hydrogenated abietic acid, methyl ester Hydrogenated abietic acid, ethylene glycol ester... 

SYNS ABIETIC ACID, METHYL ESTER METHYL ESTER of WOOD ROSIN METHYL ESTER of WOOD ROSIN, partially hydrogenated (FCQ... 

Synonyms cas 127-25-3 abietic acid, methyl ester methyl ester of wood rosin methyl ester of wood... 

Abietic acid methyl ester. See Methyl abietate Abietinic acid. See Abietic acid... 

Synonyms Abietic acid methyl ester Methyl [1R-(1a,4ap,4ba,10aa)j-1,2,3,4,41,4b,5,6,10,10a-decahydro-1,4a imethyl-7-(1-methylethyl)-1-phenanthrenecarboxylate Methyl ester of wood rosin 1-Phenan-threnecarboxylic acid, 1,2,3,4,4a,4b,5,6,10,10a-decahydro-1,4a-dim-ethyl-7-(1-methylethyl)-, methyl ester, [1R-(1a,4ap,4ba,10aa)j- Podocarpa-7,13-dien-15-oic acid, 13-isopropjrt-, methyl ester Wo rosin, methyl ester... 

In the THM-GC profile of the printing ink resin,dimethyl fumarate (peak 6) is detected, suggesting the presence of maleic or fumaric acid. Pentaerythritol is indicated by the presence of the tetra- and trimethyl ethers (peaks 7 and 8, respectively). Tertiary butyl phenol and methyl and dimethyl tertiary butyl phenols are detected as their methyl ethers (peaks 9, 10, and 11, respectively). Rosin acid methyl esters are detected with dehydroabietic acid and abietic acid methyl esters predominating (peaks 15 and 16, respectively). This resin is therefore diagnosed... 

Beckman rearrangement of the oxime of 7-ketodehydroabietate with phosphoric acid gives the expected lactam (50) and a decarbonylated amine (51). The dihalocarbene adduct of methyl abietate is formed " across the 7(8) double bond. The photo-oxidation of methyl isopimarate, which has a A -double bond, gives 7a-hydroxysandaracopimaric acid methyl ester. However, in the pimaric acid series both the 7a- and 14a-allylic alcohols are formed. 

Composition. Rosin is primarily a complex mixture of monocarboxyUc acids of alkylated hydrophenanthrene nuclei. These constituents, known as resin acids, represent about 90% of rosin. The resin acids are subdivided into two types, based on their skeletal stmcture. The abietic-type acids contain an isopropyl group pendent from the carbon numbered 13. The pimaric-type acids have a methyl and vinyl group pendent from the same carbon atom. Figure 1 shows the stmcture of typical resin acids abietic acid, C2QH2QO2 (1) is predominant. The remaining 10% of commercial rosin consists of neutral materials that are either hydrocarbons or saponifiable esters. These materials are derived from resin acids by decarboxylation or esterification. 

Both Hercolyn and Abalyn combine the solvent power of abietic acid with that of a methyl ester. Thus, they may act ar. resins and as plasticizers. Both possess excellent wetting ability, even for nonporous materials such as ass and metals. Hercolyn was proposed (Refs 2 3) as a coating for NC proplnt grains Refs 1) Beil — does not list abietic acid (abi-etinsaure) or methyl-abietate 2) E.S. Goodyear, USP 2147698 (1939) CA 33, 4040 (1939) 3) H.M. Spurlin G.H. Pfeiffer, USP... 

Studies aimed at the synthesis of the tetracyclic steroid skeleton from dehydro-abietic acid have centred, in their initial stages, on transformations of the C-13 isopropyl group. The full paper describing the conversion of methyl 12-acetyl-abieta-8,ll,13-trien-18-oate into methyl 13-hydroxypodocarpa-8,ll,13-trien-18-oate by nitrodeacylation and dealkylation reactions, has appeared. Birch reduction of the methyl ether of the phenol afforded the a/5-unsaturated ketone (56) which is a useful synthetic intermediate. Methods for the conversion of podocarpic acid into the a) -unsaturated ketones (57 R = CO2H and CHjOAc) have been investigated reduction of the ester (58 R = C02Me) with lithium in liquid ammonia, which was accompanied by decarboxylation, gave only a... 

This group of semi-synthetic resins is rather difficult to analyze by other techniques, and pyrolytic methods have been applied successfully for their analysis, either using direct pyrolysis or using pyrolysis with hydrolysis and methylation for example in the presence of TI H [66, 67], The pyrolysate in the presence of TMAH contains fragments of both components of the resin, including the methyl ester of abietic acid and various methylated phenols. 

The acid (337) prepared from (-)-abietic acid was reduced by lithium ethylamine-terf-amyl alcohol to compound 338. The methyl ester of 338 was hydroxylated and the resulting diol cleaved to give diketone 339. The latter was cyclized by treatment with acid to the a,/8-unsaturated ketone (340). Although rings A and can be easily substituted by appropriate reactions to derive the corresponding aconitine-type alkaloid, the major problem with this route is the introduction of the ring C substituents. 

Methyl esters of soybean oil. See Methyl soyate Methyl ester stearic acid. See Methyl stearate Methyl ester of wood rosin. See Methyl abietate Methyl rosinate [[(1-Methyi-1,2-ethanediyi) bis [carbamodithioato]] (2-)] zinc homopolymer. See Propineb... 

Synonyms Hydrogenated methyl ester of rosin Hydrogenated methyl rosinate Methyl abietate, hydrogenated Methyl rosinate, hydrogenated Resin acids and rosin acids, hydrogenated, methyl esters... 

Podocarpa-7,13-dien-15-oic acid, 13-isopropyl-, methyl ester. See Methyl abietate Podocarpa-8,11,13-trien-15-oic acid, 13-isopropyl-, methyl ester. See Methyl dehydroabietate... 

Only methyl and ethyl esters are prodnced on a commercial scale. Use is rapidly declining because both rosin and esters of abietic acid are known allergens. Abietates have high boiling points (methyl abietate - 360°C). Rosin and abietates are considered to be plasticizers and tackifiers. Potentially they may be nsed in canlks, adhesives, and varnishes. 

Glaessner, Austria, 1931), ammoniacal bleached shellac (Wruble, 1933), stearic acid, carnauba wax, petrolatum, elm bark, and agar (Miller, 1935, and Worton, 1938), and abietic, oleic, and benzoic acids with methyl abietate (Eldred, 1937). Since 1940, research on enteric coatings has focused on the synthesis of resinous polymers, which are insoluble in acids, such as cellulose acetate phthalate (Hiatt, 1940) and a glycerol-stearic acid-phthalic anhydride ester (Volweiler and Moore, 1940). 

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