Methyl-cyclo-pentane

Methyl-cyclo-pentane CH3—cyc/o-CsHg 85.611.2 358.215.0 Derived from AfH in ref. 1986PED/NAY... 

Markownikoff, On Methyl Cyclo-Pentane from different Sources... 

M SOj-CsHb c>k DMSO 25 to /-(1-Methyl-l-nitro-ethyI)-2-oxo-I-phenyl.iutfonyl-cyclo-pentan 54 76-77... 

Free-radical epimerisation of unactivated tertiary carbon atoms by irradiation in cyclohexane containing 1 equivalent of mercuric bromide has been demonstrated in both cyclo-pentanes and -hexanes. Thus, 5/S-androstane gives 95 % 5, 14 -androstane after irradiation for 12 hours. Irradiation for longer periods gives up to 70% of the 5a,14jS-androstane. Similarly, irradiation of 3, 11 P-diacetoxy-4 -methyl-5a-androstane led to quantitative epimerisation and the formation of the 4a-methyl-14 -isomer. ... 

Wong (1981) studied the competition between the self-reaction of t-C4H90 radicals and the reaction of r-C4H90 with several hydrocarbons in solution at 293 K. He used a flash-photolysis system with electron-spin-resonance detection of the radicals to measure the competitive reactions. Based on his earlier results for the hydrocarbon rate coefficients (Wong, 1979), he deduced the rate coefficient for the self-reaction to be (1.3 0.5) x lO A/ -sec at 293 K. The hydrocarbons used in the competitive experiments were cyclo-pentane, anisole, methyl-terr-butylether, and methanol, with respective rate coefficients for reaction with I-C4H90 of 3.4 X 10 , 7.2 x lO, 2.43 x 10 , and 1.29 x 10 M -sec . ... 

Write the most likely major product(s) of each of the following haloalkanes with sodium ethoxide in ethanol or potassium ferf-butoxide in 2-methyl-2-propanol (tert-butyl alcohol), (a) Chloromethane (b) 1-bromopentane (c) 2-bromopentane (d)l -chloro-l-methylcyclohexane (e) (l-bromoethyl)-cyclo-pentane (f) (2i ,3i )-2-chloro-3-ethylhexane (g) 2R,3S)-2-chloro-3-ethylhexane (h) (2S,3R)-2-chloro-3-ethylhexane. 

Methoxytrimethylsilane, 123 Methyl acetoacetate, 92 Methyl bromoacetate, 107 Methyl 11-hydroxyundecanoate, 58 Methyl lithium, 27,28 Methyl 10-undecenoate, 58 2-Methyl-l, 3-dithiane, 81 (fl/ ,5 )-Methyl-3-phenyldiniethyl-silyl-3-phenylpropionic acid, 53-4 2-Methyl-3-Phenylprop-2-cnal, 111 2-Methyl 2-lrimethylsilyl-1,3-dithiane, 81 2-Methyl-l-(trimcthylsilyloxy)cyclo-hex-l-ene, 100,109 2-Melhyl-l-lrimethylsilyloxy)cyclo-hcx-6-enc, 100 2-Methyl-2-trimethylsilyloxy-pentan-3-one, 132 2-Methylacetophenone, 42-3 2-Methylbutyraldehyde, 85 2-Methylcyclohexanone, 99,100 2-Methylcyclohexanone, 131 4-Methyldec-4-ene, 67-8 Methylenation, 63 2-Methylpropen-l-ol, 131 Methyltriphenylphosphonium bromide, 27 Michael addition, 85 Monohydridosilanes, 128 Monohydroalumination, 29... 

The final product of the action of nitric acid on hexamine or hexamine dinitrate is RDX see Vol 3, p C614. At low temps, however a number of other compounds are produced (Ref 2). Dilution of the hexamine dinitrate-nitric acid reaction mixture at low temperatures with ethyl ether and subsequent treatment of the gum so obtained with methyl and ethyl alcohols and water severally leads to l-alkoxy-3 5-dinitro-l 3 5-triazacyclohexane (IV), l 3-di-nitro-l 3 5-triaza-n-pentane 5-nitrate (V), and methylenedi-1 -(3 5-dinitro-1 3 5-triaza-cyclo-hexane) (VI). Dilution of the reaction mixture with methyl and ethyl alcohol produces mainly 3 5-dinitro-1 3 5-triazacyclohexane nitrate (II). 

Naphthenes, as illustrated by methyl-cyc/o-pentane, leads to the formation of one Ci fragment and a cyclo-Cs fragment. The other possibilities are linear and branched Ce fragments which can ultimately... 

Bicyclo[2.1.0]pentane (7 equation 3) readily undergoes a cycloaddition across carbon-carbon double bonds in the presence of nickel(O) complexes. The mode is formally analyzed as a thermally forbidden [2 + 2] process and is in striking contrast to that of the lower homolog, bicyclo[1.1.0]butane, which suffers cleavage of two o -bonds and affords formal allylcarbene addition products. When a solution of bi-cyclo[2.1.0]pentane (7) and [Ni(AN)2] in excess methyl acrylate is heated at 40 C for 36 h under a nitrogen atmosphere, the stereoisomeric cycloadducts exo- and c/ product methyl 3-(cyclopent-2-enyl)propionate (10a 22%). Reaction of (7) with acrylonitrile affords the corresponding adducts (8b), (9b) and (10b). 

Photolysis of 6-methylcholesta-3,5-diene in pentane/ethanol (1 4) gave two isomeric vinylcyclopropane derivatives 6-methyl-3jS,5-cyclo-5 -cholest-6-ene (1,40%) and 6-methylene-3jS,5-cyclo-5j9-cholestane (2,20%). In addition, two ethyl ethers, 3a-ethoxymethyl-6-methyl-y4-norcholest-5-ene (3,17%) and 6)S-ethoxy-6a-methyl-3j8,5-cyclo-5) -cholestane (4, 5%) were formed. ... 

M methyl Cy cyclo C5, C6, C9, CIO, Cll pentane, hexane, nonane, decane, and undecane, respectively Pr propyl iP isopropyl. 

AU the liquids (at room temperature) of the families of straight-chain or branched hydrocarbons, cyclo-parafGns, and aromatics, with each other, for example, -hexane, 2-methyl-pentane, cyclohexane, benzene. 

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