Pentane 1-chloro

Chloro-l-nitrobenzene [88-73-3] M 157.6, m 32.8-33.2°. Crystd from EtOH, MeOH or pentane (charcoal). 

Chloro-tri-isopropyl titanium [20717-86-6] M 260.6, m 45-50 , b 61-65 /0.1mm. Distd under vacuum and sets slowly to a solid on standing. Stock reagents are made by dissolving the warm liquid in pentane, toluene, Et20, THE, CH2CI2, and can be stored in pure state or in soln under dry N2 for several months. The reagent is hygroscopic and is hydrolysed by H2O. [Chem Ber 118 1421 1985.]... 

Assume that you have carried out a radical chlorination reaction on (P)-2-chloro-pentane and have isolated (in low yield) 2,4-dichIoropentane. How many stereoisomers of the product are formed and in what ratio Are any of the isomers optically active (See Problem 10.24.)... 

Achiral 2-chloro-2-methylpentane, 1-chloro-4-methvl pentane... 

To a —78 C solution of 23.1 mL (100 mmol) of triisopropyl borate and 8.15 mL (110 mmol) of 3-chloro-l-propene in 100 inL of dry THF is added dropwisc via a cannula over 0.5 h a solution of LDA (110 mmol prepared in 200 mL of THF from 110 mmol of diisopropylamine and 47.9 mL of 2.3 M butyllithium in hexane), This mixture is stirred for an additional 0.5 h at — 78 "C then a solution of 75.9 ntL of 2.9 M anhyd hydrogen chloride in diethyl ether is added and the mixture is allowed to warm to 25 °C. The mixture is concentrated in vacuo (20 Torr) and the residue extracted with three 100-mL portions of pentane, Filtration under nitrogen followed by distillation under reduced pressure provides 18.0 g (88%) of diisopropyl l-chloro-2-propenylboronate bp 95-96 "C/25 Torr. Transesterification of this intermediate with 1.3-propanediol provides the title compound in almost quantitative yield bp 110-112°C/20Torr. 

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... 

CHLORO-2-METHYLBUTANE N-METHYLPYRROLIDINE PIPERIDINE tert-BUTYLFORMAMIDE ISOPENTANE NEOPENTANE n-PENTANE... 

CCh Chloro- form Di- Pentane Heptane Cyclo- Benzene Toluene chloro- hexane methane ... 

Di-p-chloro-bis(i74-l,5-cyclooctadiene)dirhodium(I) is a yellow-orange, air-stable solid. It can be used directly as obtained for preparative purposes5 or as a precursor for homogeneous catalysts.3,4 It can be recrystallized from dichloro-methane-diethyl ether to give orange prisms. The compound is soluble in dichloro-methane somewhat less soluble in acetone and insoluble in pentane and diethyl ether. Characteristic strong bands occur in the infrared spectrum at 819, 964, and 998 cm 1 (Nujol mull). The cyclooctadiene vinylic protons resonate in the 1H NMR spectrum at t 5.7 and the allylic protons at t 7.4-8.3 (deuteriochloroform solution). Other physical properties are given by Chatt.1... 

Fig. 6 Temperature dependence of koBs values for para-fluoro (1), para-chloro (2), para-bromo (3), and para-iodo (4) singlet phenylnitrene in pentane.

Problem 6.53 Outline the steps needed for the following syntheses in reasonable yield. Inorganic reagents and solvents may also be used, (a) IXhloropentane to 1,2-dichloropentane. (b) IXhloropentane to 2-chloro-pentane. (c) IXhloropentane to 1-bromopentane. (d) l-Bromobutane to 1.2-dihydroxybutane. (e) Isobutyl chloride to... 

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