2.4- Dimethyl-3-pentyl esters

Chiral allenylboronic esters.1 The enantioselectivity in synthesis of homo-propargylic esters by the reaction of aldehydes with chiral allenylboronic esters (11, 181) is markedly increased by use of bis-2,4-dimethyl-3-pentyl esters of d- or vAaxtaric acid rather than the diethyl ester. Yields in the reaction of various saturated aldehydes are 70-90%, and optical yields are consistently greater than 90% and even higher (97-99%) when the aldehyde is present in excess. However, yields are poor in reactions with aryl and a,p-unsaturated aldehydes. This modified procedure was used in a synthesis of (S)-(—)-ipsenol (2) from d-(—)-bis(2,4-di-methyl-3-pentyl) tartrate (1) (equation I). 

S-2,4-dimethyl-3-pentyl ester, a side-chain protecting group for aspartic acid in SPPS [A. H. Karlstrom, A. E. Unden, Tetrahedron Lett. 1995, 36, 3909]. 

The 1,2-disubstituted 2-cyclopropenecarboxylates are useful for the synthesis of optically active cyclopropane building blocks containing an all-carbon quaternary stereogenic center.Treatment with LiAlUj produced fra/w-cyclopropane derivative as the sole product through a sequential reduction of the ester moiety and hydroalumination of the double bond (eq 3). Alternatively, catalytic hydrogenation proceeded from the opposite face to the 2,4-dimethyl-3-pentyl ester moiety and subsequent reduction with DIBAL-H gave cis-cyclopropane product with virtually complete diastereoselectivity. 

C20H38O4 hexanedioic acid bis-(2,2-dimethyl-pentyl) ester 40736-03-6... 

Acetic acid 4-dimethylamino-1 -ethyl-2,2-diphenyl-pentyl ester, [S-(R R )]-p-[2-(Dimethyl-amino)propyl]-a-ethyl-p-phenylbenzeneethanol acetate, C23H31N02, Mr 353.50 hydrochloride C23H31N02. HCI, Mr 389.96, mp 215 °C, [a]D25 -60° (c = 0.2, water)... 

Phosphorodithioic acid, mixed 0,0-bis (isobutyl and pentyl) esters, zinc salt. See Zinc dialkyl dithiophosphate Phosphorofluoridic acid, calcium salt. See Calcium monofluorophosphate Phosphorofluoridic acid, disodium salt. See Sodium fluorophosphate (Na2P03p) Phosphorofluoridic acid, monoammonium salt. See Ammonium monofluorophosphate Phosphorofluoridic acid, potassium salt. See Potassium monofluorophosphate Phosphorothioic acid. See Diazinon Phosphorothioic acid, S-((6-chloro-2-oxooxazxolo(4,5-b) pyridin-3(2H)-yl)methyl) 0,0-dimethyl ester. See Azamethiphos, Phosphorothioic acid, 0-(2,5-dichloro-4-iodophenyl) 0,0-dimethyl ester. See lodofenphos... 

C19H34O4 2,2-dimethyl-3-pentyloxycarbonylmethyl-cyclobutanecarboxylic acid pentyl ester 102180-03-0... 

A fermented-egg product (EEP), patented as an attractive bait for synanthropic flies, has been shown to be attractive to coyotes and repeUent to deer (79). Its components are variable, with relative concentrations of 77% fatty acids, 13% bases, and 10% (primarily) neutrals composed of at least 54 volatiles such as ethyl esters, dimethyl disulfide, and 2-mercaptoethanol. Synthetic formulations have been evaluated to find a replacement for a patented fermented-egg protein product that attracts coyotes and repels deer. Ten aUphatic acids (C-2 to C-8), four amines (pentyl, hexyl, heptyl, and trimethyl), dimethyl disulfide, 2-mercaptoethanol, and 54 more volatiles (C-1 to C-5 esters of C-1 to C-8 acids) have been tested as synthetic fermented egg (SEE) (80) in approximately the same proportions that are present in EEP. Weathering was a problem that caused decreased efficacy, which suggests trials of controUed-release formulations. Eourteen repeUents have been examined against white-taU deer in Peimsylvania in choice tests when treated onto sheUed com (81). 

Carboxy-4-methyl-5-pentyl-2-furanpropanoic acid (273), isolated from blood and urine, is a hitherto unknown class of metabolic compound. The structure of (273) has recently been confirmed by synthesis (80CB699). 2,4,5-Trialkyl substituted furan-3-carboxylic acids have been synthesized from acyloin and /3-ketoesters by treatment with zinc chloride. By analogy with this synthetic route, the reaction of acetoin with 3-oxoadipic acid dimethyl ester was found to yield the 2,3-dimethylfuran (274). The dimethyl ester (275) was prepared by condensation of 3-chloro-2-octanone with 3-oxoadipic acid dimethyl ester and was shown to be identical with the dimethyl ester of the natural product. 

Diacetatopalladium. See Palladium diacetate Diacetic ether. See Ethylacetoacetate Diacetin (INCI). See Glyceryl diacetate Diacetone. See Diacetone alcohol Diacetone acrylamide CAS 2873-97-4 EINECS/ELINCS 220-713-2 Synonyms Acrylamide, N-(1-1dimethyl-3-oxobutyl)- 4-Acrylamido-4-methyl-2-pentanone DAA Diallyl ester acetic acid N-(1,1-Dimethyl-3-oxobutyl) acrylamide N-(1,1-Dimethyl-3-oxobutyl)-2-propenamide N-(2-(2-Methyl-4-oxopentyl)) acrylamide N-(2-Methyl-4-oxo-2-pentyl) acrylamide 2-Propenamide, N-(1,1-dimethyl-3-oxobutyl)-Classification Acrylamide Empirical C9H15NO2... 

Di-t-butyl-4-hydroxybenzolc acid, n-hexadecyl ester 3,5-Di-t-butyl-4-hydroxyhydrocinnamic acid, 1,3,5-tris (2-hydroxyethyl)-s-triazine-2,4,6-(1H,3H,5H)-trione triester Dicetyl thiodipropionate Dicyandiamide Didodecyl-1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate Dimyristyl thiodipropionate p,p -Dioctyldiphenylamine 2,4-Di-t-pentyl-6-(1-(3,5-di-t-pentyl-2-hydroxyphenyl) ethyl) phenyl acrylate Distearyl pentaerythrityl diphosphite Drometrizole Ethylenebis (oxyethylene) bis (3-t-butyl-4-hydroxy-5-methylhydrocinnamate) 2,2 -Ethylidenebis (4,6-di-t-butylphenol) 2,2 -Ethylidenebis (4,6-di-t-butylphenyl) fluorophosphonite N,N -Hexamethylene bis (3,5-di-t-butyl-4-hydroxyhydrocinnamamide) Hexamethylenebis (3,5-di-t-butyl-4-hydroxycinnamate)... 

C10H18O4 2-pentyl-propanedioic acid dimethyl ester 39520-2 ... 

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