Acetoxy-triethyl

Among the more recent examples of furan synthesis is the cyclization of the unsaturated 1,4-diketone (9) in acetic anhydride to afford 3-acetoxy-2,4,5-triphenylfuran (10). Treatment of l,2,3,4-tetrapheny but-2-ene-l,4-dione (PhCOCPh==CPhCOPh) with triethyl phosphite yields 2,3,4,5-tetraphenylfuran (79JOC494). 1,2-Diaroylethylenes have been converted to 2,5-diarylfurans with tin(II) chloride and hydrochloric acid (62ZOB1195). 

SYNS ATEC CITRIC ACID, ACETYL TRIETHYL ESTER CITROFLEX A 2 1,2,3-PROPANE-TRICARBOXYLIC ACID, 2-(ACETYLOXY)-, TRIETHYL ESTER (9CI) D TRICARBALLYLIC ACID, P-ACETOXY-TRIBLnrYL ESTER TRIETHYL ACETYLCITRATE TRIETHYL CITRATE, ACETATE TRIETHYLESTER KYSELINY ACETYLCITRONOVE... 

Citric acid, triethyl ester, acetate Citroflex A 2 EINECS 201-066-6 NSC 3887 Tricarballylio acid, p-acetoxytributyl ester Triethyl 2-acetoxy-1,2,3-propanetricarboxyiate Trieth-yl acetyl-citrate Triethyl citrate, acetate Triethyl 0-acetylcitrate Triethylester kysellny acetylcitronove. Plasticizer for cellulosics used in food packaging materials. Liquid bp40 = 214°, bpioo = 228-229° d = 1.136 n o = 1.4390. Yamanouchi Europe B.V. Yamanouchi Pharma. 

Triethyl 2-acetoxy-1,2,3-propanetricarboxylate Triethyl acetylcitrate C14H22O3 77-89-4 318.320 21440 1.136 1.4380 ... 

Zinc pyrithione preservative, adhesives 6-Acetoxy-2,4-dimethyl-m-dioxane 2,6-Bis (dimethylaminomethyl) cyclohexanone 2-Bromo-2-nitropropane-1,3-diol p-Chlorobenzoic acid p-Chloro-m-cresol Chloroxylenol 2,2-Dibromo-3-nitrilopropionamide Diiodomethyl tolylsulfone 3,5-Dimethyl tetrahydro-2-H,1,3,5-thiadiazone-2-thione Hexahydro-1,3,5-triethyl-s-triazine... 

Poly (hexamethylenebiguanide) hydrochloride preservative, cut flowers 1,3,5-Trihydroxybenzene preservative, cutting fluids Hexahydro-1,3,5-triethyl-s-triazine Quaternium-15 2-Thiocyanomethylthiobenzothiazole preservative, cutting oils 6-Acetoxy-2,4-dimethyl-m-dioxane Tetrachlorosalicylanilide preservative, defoamers coatings, food-contact Potassium trichlorophenate preservative, defoamers food-contact coatings Formaldehyde p-Naphthol Potassium pentachlorphenate Sodium 2-mercaptobenzothiazole Sodium pentachlorophenate Sodium-2,4,5-trichlorophenate preservative, defoamers food-contact paper/paperboard... 

Formally the process is comparable to an electrochemical reduction on mercury drops (p. 290), but lower yields (30-75%) are obtained sonochemically than electro-chemically (>90%). With unsymmetrical dibromoketones, mixtures of two isomeric a-acetoxy ketones are obtained, but the selectivity is enhanced by using bulkier acids, e.g., trimethyl- or triethyl acetic acid. Oxyallyl cations from a,a -dibromoketones add to olefins or dienes in a [3 + 2] or [3 + 4] mode, the Noyori or Hoffmann-Noyori reaction. 21,322... 

P-chiral phosphines, which are potential ligands for transition metal-catalyzed reactions, were synthesized through hpase-catalyzed optical resolution of the corresponding racemic phosphine oxide compounds (Fig. 10.29). For example, lipase from C. rugosa (CRL) was used for the enantioselective hydrolysis of acetoxynaphthyl phosphine oxide (Fig. 10.29(a)). The P-enantiomer was hydrolyzed selectively, leaving the (S)-acetoxy compound, which was further subjected to chemical hydrolysis. Both enantiomeric phosphine oxides were obtained in >95% after recrystallization. Methylation followed by reduction with triethyl amine/trichlorosilane, with inversion of configuration, yielded the desired chiral phosphine. 

---