N-Propylamine as reagent

Triple bonds s. Acetylene derivs. Triplet sensitizer -, anthraquinone as - 26,990 Tri-n-propylamine as reagent 26, 66, 564... 

Kinetic resolution of secondary allylic alcohols by Sharpless asymmetric epoxidation using fert-butylhydroperoxide in the presence of a chiral titanium-tartrate catalyst has been widely used in the synthesis of chiral natural products. As an extension of this synthetic procedure, the kinetic resolution of a-(2-furfuryl)alkylamides with a modified Sharpless reagent has been used . Thus treatment of racemic A-p-toluenesulphonyl-a-(2-furfuryl)ethylamine [( )-74] with fert-butylhydroperoxide, titanium isopropoxide [Ti(OPr-/)4], calcium hydride (CaHa), silica gel and L-(+)-diisopropyl tartrate [l-(+)-DIPT] gave (S)-Al-p-toluenesulphonyl-a-(2-furfuryl)ethylamine [(S)-74] in high chemical yield and enantiomeric excess . Similarly prepared were the (S)-Al-p-toluenesulphonyl-a-(2-furfuryl)-n-propylamine and other homologues of (S)-74 using l-(+)-D1PT. When D-(—)-DIPT was used, the enantiomers were formed . ... 

Amine etching was used to reveal the structure of PET as early as 1959 [55] when PET fibers were etched with n-propylamine for replica formation. Methylamine was also used [248], although the selectivity of the reagent was questioned. Tucker and Murray [249] etched PET filaments with 42% aqueous solutions of n-propylamine at 30°C. Apparently, the first step in the reaction is the removal of the fiber skin and then crazing. A... 

FIGURE 7.18 (a) PICI spectrum of V-nitroso-di-n-propylamine (peak 4 in Figure 7.17a) with ammonia as the reagent gas. (b) PICI spectrum of V-nitroso-di-n-propy-lamine (peak 4 in Figure 7.17b) with isobutane as the reagent gas. (c) PICI spectrum of V-nitroso-di-n-propylamine (peak 4 in Figure 7.17c) with methane as the reagent gas. (Masucci and Caldwell, unpublished data.)... 

Dinitrobenzamides are very suitable derivatives for paper chromatography. The derivatives of primary and secondary aliphatic amines behave quite differently on chromatograms. As tertiary amines do not react with the reagent, the method offers a good opportunity for the differentiation of primary, secondary, and tertiary amines. In the solvent system 25% dimethylformamide/hexane the primary amines from methylamine to amylamine remain at the start, while higher amines, up to C14, separate well (Fig. 34). Lower secondary amines also remain at the start. Only di-n-propylamine and di-n-butylamine move. The formamide/hexane... 

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