Tripropyl amine

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°. 

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.)... 

The amount of water present during the synthesis of large AFI-type aluminophosphate crystals was found to be of significant importance. However, yield of AlP0 -5 and crystal size were countercurrently influenced. It follows tnat at least with tripropyl amine, either few large crystals or maximum conversions into small particle AlP0 -5 is possible. 

Characterization, The TPA concentration in the reaction mixtures was determined by Induced Coupled Plasma Atomic Emission Spectroscopy (ICPAES) carbon analysis, which was preceded by n-hexane extraction in order to remove tripropyl amine. 

Tripropyl amine (Pr3N). As in the case of AlP04-5, MeAPO-5 is readily synthesized with a variety of templates, including tripropyl amine (Pr3N), tetrapropylammonium (TPAOH),... 

Aluminophosphate A1PQ4 5. AlPO -5 was obtained from compositions containing pseudoboehmite (Pural SB, Condea) which was added to aqueous phosphoric acid (Merck, 85%) and deionized water. Finally, tripropyl amine (Aldrich) was continuously added to the stirred solution. The crystallization time was limited to 72 hours. 

Synthesis of large AFI-tvpe crystals. For these studies of the crystallization of large AFI-type aluminophosphate crystals, the reaction temperature T, the concentration of tripropyl amine Pr3N, and the amount of water were chosen as operational variables. Synthesis runs were performed with each of these "factors" at a high (+) and a low (-) level, for molar compositions with b Pr3N - A1203 - P2O5 - c H20 as indicated in Table I ... 

Another popular oxidative-reduction example is Ru(bpy)3 " /tripropyl-amine (TPrA) system. It is the basis of commercial systems for immunoassay and DNA analysis due to the high ECL efficiency. The mechanism of Ru(bpy)3 +/TPrA system is very complicated and has been elucidated in detail in the literature. Generally, the ECL emission spectra of this system... 

Leland JK, Powell MJ (1990) Electrogenerated chemiluminescence an oxidative-reduction type ECL reaction sequence using Tripropyl Amine. J Electrochem Soc 137(10) 3127-3131. doi 10.1149/1.2086171... 

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