Tripropyl

Hydrogen chloride or a few drops of hydrochloric acid cataly2e the conversion of //-butyraldehyde iato the trimer, parabutyraldehyde, C22H24O2, (2,4,6-tripropyl-l,3,5-trioxane [56769-26-7] (1). The reaction is reversed by heating the parabutyraldehyde ia the presence of acid. Anhydrous hydrogen chloride at —40°C converts //-butyraldehyde iato l,l -dichlorodibutyl ether, (2) ia 70—75% yield (10). 

TRIORTHOCRESYL PHOSPHATE TRIPHENYLTIN CHLORIDE TRIPHENYLTIN HYDROXIDE TRIPROPYL ALUHINUH TRIPROPYLAMINE... 

Another approach for producing isoprene is the dimerization of propylene to 2-methyl-1-pentene. The reaction occurs at 200°C and about 200 atmospheres in the presence of a tripropyl aluminum catalyst combined with nickel or platinum. 

Aromatische Carbonsauren werden durch Trichlorsilan in Acetonitril und Tripropyl-amin wahrscheinlich iiber das Carbonsaureanhydrid zu den Benzyl-trichlorsilanen si-lyliert, die zu den Kohlenwasserstoffen gespalten werden konnen6 ... 

Trichlor-(4-ath ox year bon yl-benzyl)-silicium3 Zu einer Losung von 10 g (52 mMol) Terephthalsau-re-monoathylester in 40 ml Acetonitril werden 32 ml (320 mMol) Trichlor-silan gegeben. Man kocht 1 Stde. un-tcr RiickfluB, kiihlt auf 0° ab, versetzt schnell mit 30m/ (160 mMol) Tripropyl-amin, kocht weitere 16 Stdn., kiihlt ab, gibt 500 ml Diathylather zu, kiihlt, saugt den Niederschlag ab, dampft ein und dcstilliert den Riickstand Aus-beute 13,4 g (79% d.Th.) Kp,., 110-115" F 72-73°. 

Carbocyclische Kationen lassen sich ebenfalls reduktiv dimerisieren z. B. Triphenyl-cyclopropenium-, Diphenyl-propyl-cyclopropenium- und Phenyl-dipropyl-cycloprope-nium-Kationen (Tripropyl-cyclopropenium-Kationen reagieren dagegen nicht)6. 

Wenn Kx K4, dann erfolgt die Reaktion (87) quantitativ. Dies ist auch dann noch der Fall, wenn K2 < K3 ist. Analog verdrangt NMes Tripropyl-... 

Triphenyltin chloride, c267 Tripropyl borate, t427 TRIS, t439... 

Tripolyphosphates, 18 844-846 Tripotassium dicitratobismuthate, 4 36 Tripotassium hexakiscyanoferrate, 14 535 Tripotassium phosphate (TKP), 18 834 2,4,6-Tripropyl-l,3,5-trioxane butyraldehyde derivative, 4 461 cis-Tripropenylbismuth dibromide, 4 31-32... 

Sodium hydride Sodium hydrosulfite Sulfur chlorides Sulfuric acid Sulfuryl chloride Tetraethyl lead Tetramethyl lead Thionyl chloride Titanium tetrachloride Toluene diisocyanate Trichlorosilane Triethylaluminum Triethylborane Triisobutylaluminum Trimethylaluminum Trimethylchlorosilane Tripropyl aluminum Vanadium tetrachloride Vinyl trichlorosilane Zirconium tetrachloride... 

The earlier work on chloroacetone (18,19) already indicated that trialkyl amines were superior to other bases for this reaction. Therefore the decision to use trialkyl amines to scavenge HCl was already determined by the literature precedent. However, when compared to the tributyl amine, smaller amines might be preferred since they could boost the reactor productivity by reducing the volume. Unfortunately, for unknown reasons, the process did not work as well with the simpler amines. Both tripropyl amine and triethyl amine displayed both lower rates and lower selectivity for methyl pivaloyl acetate. (See Table 6.)... 

In view of the ease with which water attacks an ester of arsenate in water, we wondered if carbon nucleophiles would similarly attack a trialkyl arsenate to form a C—As bond. We (Sparkes and Dixon, unpublished work) therefore treated the sodium salt of diethyl malonate with tripropyl arsenate, and hydrolyzed during workup. Some arsonoacetic acid was formed, but we have not found conditions that give a useful yield. 

Phosphoric acid triesters in human blood plasma have been determined by GC-ICP-MS after SPME,27 after their separation from blood plasma, with detection limits of 50ngl-1 for tripropyl phosphate, 17ngl 1 for tributylphosphate and 24ngl 1 for triphenylphosphate. 

It is important to use dry air and dry equipment because difluorotris(perfluoroalkyl)-25-phos-phanes react very rapidly with water to form tris(perfluoroalkyl)phosphane oxides. Under these conditions, the electrochemical perfiuorination of triethyl-, tripropyl-, and tributylphosphanc oxides yields 15-50% of the corresponding difluorotris(perfluoroalkyl)-A5-phosphanes. A decrease in yield is observed with a longer carbon chain (chain with 2C atoms 42%, with 6C atoms 24 %).63 Byproducts are perfluorinated alkanes. Addition of bromine makes it possible to electrochemically fluorinate trialkylphosphane oxides with a carbon chain length of C5 to... 

Aluminum Stearate. See under Stearates Aluminum Stearate Gels. See under Stearates Aluminum Triethyl. Same as Triethyl Aluminum Aluminum Tripropyl. Same as Tripropyl Aluminum... 

In one study, the Johnson-Claisen rearrangement was carried out with tripropyl a-fluoroor-thoacetate to give 2-fluoroalk-4-enoates 18 in moderate yields.37 2,3-Disubstituted ester 18d is formed in a diastereomeric ratio of nearly 1 1. 

Tripropyl borate, t406 TRIS, t423 l,l,l-Tris(hydroxymethyl)ethane, h 41... 

Luminescence lifetime Tributyl phosphate Tetraoctylammonium Tripropyl phosphate... 

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