Pentane pentyl

Penten-l-ol, see 1-Pentene Pentyl hydroperoxide, see Pentane Pentyl nitrate, see 2-Methylbntane, Pentane Peroxyacetal nitrate, see 2,3-Dimethylbutane, Hexane. 

M-Pentane -Pentyl group Asterisk denotes point attachment to molecule ... 

Beilstein Handbook Reference) AI3-16105 Amyl aldehyde BRN 1516304 Butyl formal CCRIS 3220 EINECS 203-784-4 FEMA Number 3098 HSDB 851 NSC 35404 Pentanal n-Pentanal Pentyl aldehyde UN2058 Valeral Valeraldehyde n-Valeraldehyde Valerianic aldehyde Valeric acid aldehyde Valeric aldehyde n-Valeric aldehyde Valetyl aldehyde Valerylaldehyde. Liquid mp = -91.5° bpn 103° d = 0.8095 Xm = 178,182,184 nm (gas) slightly soluble in H2O, soluble in EtOH, EtzO. 

The difference in behaviour between pentyl and butyl cation systems (Figs. 3 and 4) has also been encountered in trapping experiments with carbonium ions, primarily formed from alkanes and SbFs, by CO (Hogeveen and Roobeek, 1972). In the case of n-butane the secondary butyloxocarbonium ion is the main product, whereas in the case of n-pentane only the tertiary pentyloxocarbonium ion is found. 

Bridgeheads. The Sn2 mechanism is impossible at most bridgehead compounds (p. 392). Nucleophilic attack in [l.l.l]propellane has been reported, however. In general, a relatively large ring is required for an SnI reaction to take place (p. 396). " The SnI reactions have been claimed to occur for l-iodobicyclo[l.l.l]pentane via the bicyclo[l.l.l]pentyl cation, but this has been disputed and the bicyclo[1.1.0]butyl carbinyl cation was... 

The yield of ethyl n -pentyl ether formed from the reduction of 1-pentanal by Et3SiH/TFA in ethanol is 57% after 6-8 hours at 50-60°.327 The yield of product increases to 72% when one equivalent of ethyl orthoformate and some anhydrous hydrogen chloride are added to the reaction medium.327 Presumably, this reduces the amount of free water in the reaction medium. 

Di-w -pentyl Ether [TMSI-Catalyzed Reduction of an Aldehyde to a Symmetrical Ether].314 A mixture of sodium iodide (0.15 g, 1 mmol), 1-pentanal (1.06 mL, 10 mmol), and trimethylsilyl chloride (2.0 mL, 15.4 mmol) was stirred in MeCN (5.0 mL) at room temperature for 10 minutes, after which 1,1,3,3-tetramethyldisiloxane (TMDO, 1.79 mL, 10 mmol) was added. When the exothermic reaction had ended (30 minutes), a solution of 2.5 N HF in MeOH (30 mL) was added to the reaction mixture, which was then refluxed for 5 minutes. Work-up was carried out by diluting the solution with CH2CI2 (40 mL), washing with water (30 mL) and saturated aqueous NaHC03 solution (20 mL), drying, and evaporating the solvents. Crude di-n-pentyl ether was purified by distillation 0.65 g (84%) bp 185-1897760 Torr. 

The oxidative addition of alkane C-H bonds to Pt(II) has also been observed in these TpRa -based platinum systems. As shown in Scheme 19, methide abstraction from the anionic Pt(II) complex (K2-TpMe2)PtMe2 by the Lewis acid B(C6F5)3 resulted in C-H oxidative addition of the hydrocarbon solvent (88). When this was done in pentane solution, the pentyl(hydrido)platinum(IV) complex E (R = pentyl) was observed as a... 

Sodium, with l-bromo-3-chloro-cyclobutane to give bicyclo [l.l.O]butane, 51, 55 Sodium amalgam, 50, 50, 51 Sodium amide, with 2,4-pentane-dione and diphenyliodonium chloride to give l-phenyl-2, 4-pentanedione, 51, 128 Sodium azide, 50, 107 with mixed carboxylic-carbonic anhydrides, 51, 49 Sodium borohydride, reduction of erythro-3-methanesulfony-loxy-2-butyl cyclobutanecar-boxylate, 51, 12 reduction of 2-(1-phenylcyclo-pentyl)-4,4,6-trimethyl-5,6-dihydro-1,3(4H)-oxazine to 2-(1-phenylcyclopentyl)-4,4, 6-trimethyltetrahydro-l,3-oxazine, 51, 25 Sodium cyanoborohydride, used... 

The ionic tin compounds were extracted as diethyldithio-carbamates into pentane then converted to pentyl magnesium bromide derivatives prior to gas chromatography. The absolute detection limit was 0.05pg tin, equivalent to 10-30ng kgy1. 

Pentane gives 1-pentyl chloride as the main product, which is highly interesting as all other oxidative functionalisations will give a secondary alkyl derivative as the product, because for radical attack the secondary hydrogens are more reactive than the primary ones. 

Photolytic. When synthetic air containing gaseous nitrous acid and pentane was exposed to artificial sunlight (A, = 300-450 nm) methyl nitrate, pentyl nitrate, peroxyacetal nitrate, and peroxypropionyl nitrate formed as products (Cox et al, 1980). 

Since the more highly strained bicyclopropylidene (1) and methylenespiro-pentane (6), both spirocyclopropanated analogs of methylenecyclopropane (2), are even more reactive than the latter, it is to be expected that analogs of the amino acids 287 and 288 containing a bicyclopropylidenyl or a methylenespiro-pentyl moiety would also exhibit biological activities. In fact, the preparations of the amino acids 289 and 290 as well as of the methylenespiropentane amino acid 295 have been reported in the meantime (Scheme 65) [55]. 

Amino-l,l-diethoxy-butan bzw. 5-Amino-1,1-diethoxy-pentan. Die so entstehenden 4-(4,4-Diethoxy-butyl)- bzw. 4-(5,5-Diethoxy-pentyl)-(3-oxo-alkyl)-amine sind Vorstufen zu Indolizidin- bzw. Chinolizidin-Derivaten man extrahiert sie aus dem Reaktionsgemisch mit verdiinnter Salzsaure und bewirkt den RingschluB durch Erhitzen dieses sauren Extraktes4. 

The ratio of two isomers of pentyl nitrate to pentane is compared with the ratio of butyl nitrate to butane in Figure 4. These two ratios are correlated. The solid line is the behavior expected from equation 1 with the... 

AMYL. The 5-carbon aliphatic group CsHji, also known as pentyl. Eight isometric arrangements (exclusive of optical isomers) are possible. The amyl compounds occur (as in fusel oil) or are formed (as from the petroleum pentanes) as mixtures of several isomers, and, sinee llieir boiling points are close and their other properties similar, it is neither easy nor usually necessary to purify them. 

This is probably because of the physical adsorption of some n-pentane molecules with their two methyl groups. After evacuation and then readdition of hydrogen, a n-pentyl profile was again obtained and retained through repeated H2 cycles. As discussed in the butene examples, the spectrum of the surface alkyl groups was much reduced (eliminated on the Pd/Si02 case) in evacuation. 

Bromopentane (pentyl bromide). Use 210g (142 ml) of 48 per cent hydro-bromic acid, 60 g (33 ml) of concentrated sulphuric acid, followed by 88 g (108ml, lmol) pentan-l-ol (b.p. 135-136°C) and lOg (5.5ml) of concentrated sulphuric acid. Distil the product through a short fractionating column, and collect the 1-bromopentane at 127-130 °C (135 g, 89%). 

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