2-methoxy-3-methylpentane

Practice Exercise Write structural formulas for the following compounds (a) 1,3-dibromo-2-pentanol, (h) 2-methoxy-3-methylpentane, (c) 2-methyl-3-pentanone, and... 

Compare the structures of 3-methoxy-3-methylpentane and 3-iodo-3-methylpentane, and identify which compound is more likely to undergo an SnI reaction. 

The present homoallylation with siloxy- and methoxy-substituted dienes may be of great synthetic use. The product 42 is easily converted to anti-5-phenyl-5-hydroxy-3-methylpentanal (Scheme 9) hence the diene 41f may be regarded as a synthetic equivalent of a bis-homoenolate of 3-methylbutanal, being capable of introducing 1,3-anti relationship between the methyl and hydroxy groups in the product. 

Synonyms 4-Methoxy-4-methylpentan-2-one 4-Methoxy-4-methyl-2-pentanone Methoxy-4-meth -4-pentanone-2 4-Methyl-4-methoxy-2-pentanone 2-Pentanone, 4-metho) -4-methyl- Pentoxane Classitication Aliphatic ketone Empirical C,H 02... 

Markownikoff addition. 2-Methylpent-l-ene allowed to react with tertAmiyl hydroperoxide and mercuric acetate with initial cooling and shaking, after 2 hrs. the volatiles removed by distillation in vacuo, and the residue digested repeatedly with coned, aq. NaCl -> l-diloromercuri-2-tert-butylperoxy-2-methylpentane. Y 19%. F. e., also hydroperoxymercuration with H2 2 s. E. Schmitz, A. Riedie, and O. Brede, J. pr. 312, 30 (1970) a-alkoxyketones from enolesters s. ibid. 312, 43 peroxy- and methoxy-mercuration of a,i -unsatd. ketones and esters s. A. J. Bloodworth and R. J. Bunce, Soc. (C) 1971, 1453. 

The characteristic aroma of blackcurrants (varieties oiRibes nigrum, Grossulariaceae) is mainly a consequence of aliphatic and aUcycUc thiols. The bearer of the characteristic cat odour is 4-methoxy-2-methyl-2-thiol, called blackcurrant mercaptan (8-124), which occurs also in olive oil and green tea. Other important components are 4-mercapto-4-methylpentan-2-one called cat ketone (8-125) and (lS,4R)-p-menthan-8-thiol-2-one (see Section 8.2.13.1.1). Cat ketone is also found in grapefruits, some hop cultivars, basil and some aromatic wines. The leaves contain about 0.7% essential oil, whose main component isp-cymol, the sulfur compounds of which contribute to the strong smell, mainlyp-menthan-8-thiol-2-one. 

Thus, the reaction will produce a racemic mixture consisting of the (R) and (S) stereoisomers of 2-methoxy-4-methylpentane. 

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