1,4-diaminobutan

Write the structural formula of two units of the polymer formed from (a) the reaction of oxalic acid (ethanedioic acid), HOOCCOOH, with 1,4-diaminobutane, H2NCH2CH2CH2CH2NFI2 (b) the polymerization of the amino acid alanine (2-aminopropanoic acid). 

The starting materials were low molecular weight polymers prepared by reacting 1,4 diaminobutane and adipic acid for two hours at 220 C in a capsule in an autoclave 10). The low molecular weight material was powdered by crushing and ballmilling. 

Kricheldorf H.R., Wollheim T., Koning C.E., Werumeus B.H.G., and Altstadt V. Thermoplastic elastomers 1. Poly(ether-ester-imide)s based on 1,4-diaminobutane, trimeUitic anhydride, 1,4-dihydroxybutane and poly(tetramethylene oxide) diols, Polymer, 42, 6699, 2001. 

Species of Pseudomonas can utilize the a,(i)-diamines putrescine, spermidine, and spermine as sources of carbon and nitrogen, and putrescine can be produced from the secondary amine spermidine together with 1,3-diaminopropane (Dasu et al. 2006). Putrescine (1,4-diaminobutane) is an intermediate in the arginine decarboxylase (ADC) pathway of L-arginine degradation, which is described later, and can be degraded, by two pathways ... 

Figure 16 Capillary electrophoretic separations of r-HuEPO at 1 mg/ml in 50 cm x 75 p i.d. uncoated capillary at 10 kV. Buffers used were (A) 10 mM tricine/10 mM NaCl, pH 6.2 (B) 10 mM tricine/10 mM NaCl/2.5 mM 1,4-diaminobutane, pH 6.2 and (C) 10 mM tricine/10 mM NaCl/2.5 l,4-DAB/7M urea, pH 6.2. (From Watson, E. and Yao, F., Anal. Biochem., 210, 389, 1993. With permission.)...

Other polydentate ligands are polyamines and related ligands. Stability constants of silver(I) complexes with polyamines in dimethyl sulfoxide,419 A-methyl-substituted 4-methyldiethylene-triamines,420 or ethylene- or N- or C-methylated ethylenediamine in aqueous solution have been reported.421 The structure of the silver 1,3-diaminopropane complex, [Ag NH2(CH2)3NH2 ]-C104,422 and complex formation with 1,4-diaminobutane and 1,5-diaminopentane have been reported.423 A dinuclear silver(I) compound with ethylenediamine [(enH)Ag(en)Ag(enH)2]4+ has... 

The nomenclature of nylon is based on the number of carbon atoms found in the monomers. Thus, caprolactam, which contains six carbon atoms per molecule is polymerized to form nylon 6. Nylon 46 (pronounced "nylon four six ) is made from 1,4 diaminobutane, which contains four carbon atoms and adipic acid which contains six carbon atoms. The convention that we use to name nylons is summarized in Fig. 23.4. 

Figure 26.1 Synthetic scheme for polypropylene imine) dendrimers using 1,4-diaminobutane as core...

The last-formulated hypothetical diamine is transformed into an indole derivative by loss of ammonia, after the fashion of well-known analogues (1 4-diaminobutane to pyrrolidine). 

While all strain effects in monoamines are basicity weakening, it is possible to find cases in di- and polyamines where strain is relieved upon protonation, leading to increased basicity. This phenomenon is observed in 1,4-diaminobutane derivatives where an almost linear N... H—(N+) hydrogen bond in the mono-protonated derivatives leads to a stable, seven-membered ring structure. Thus, for example, the measured PA of l,6-diazabicyclo[4.4.4]tetradecane (73) is 228.3 kcalmol-1, about 11 kcalmol-1 higher than its monoamine analog 75, despite the similar, inwardly pyramidalized, nitrogen conformation of both neutral amines. 

To this group of siderophores belong photobactin (42a) from Photorhabdus luminescens (Fig. 12) 66), derived from 1,4-diaminobutane substituted by DHB and by cyclized DHB-Thr ( H-NMR data indicate that the substituents of the oxazoline ring are in trans positions the absolute stereochemistry is not known),... 

Dead mice are as attractive as live mice, and dead mouse odor is as active as a dead mouse (Shivik and Clark, 1997). Elucidation of the feeding stimuli used by this species will aid in effective trapping for snake control. Fractions of dead mouse odor are being bioassayed. The best known constituents of rotting carcass (e.g. fish) odor, putrescine (1,4-diaminobutane NH2CH2CH2NH2) and cadaver-ine (NH2CH2CH2CH2NH2) were not active. 

The nitration of 1,1,2,2-tetraiodoethylene (182) with 90% nitric acid provides 1,1-diiododinitroethylene (183) in good yield. Baum and co-workers studied the chemistry of 1,1-diiododinitroethylene and found that displacement of the two vinylic iodide groups is effected by treatment with simple aliphatic amines, diamines and anilines to give 1,1-diamino-2,2-dinitroethylenes in excellent yield. Cyclic products are obtained from the reaction of 1,1-diiododinitroethylene with 1,2-diaminoethane (ethylenediamine), 1,3-diaminopropane and 1,4-diaminobutane. The spirocycle (184) is synthesized from the reaction of 1,1-diiododinitroethylene (183) with 2,2-bis(methylamino)-l,3-diaminopropane. 

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