Cyclohexane, 1,1-diethoxy

Cyclohexanone diethyl ketal, Cyclohexane, 1,1-diethoxy- (1670-47-9), 65, 17 Cyclohexanone, 5-methyl-2-(l-methylethyl)-, (2R-cis)-, 65, 81 CYCLOHEXANONE, 5-METHYL-2-(1-METHYLETHYLIDENE)-, (R)-, 65, 203, 215 Cyclohexanone, 5-methyl-2-(l-methy1-1-phenylethyl)-, (2R-trans)-, 65, 203 Cyclohexanone, 5-methyl-2-(l-methyl-l-phenylethyl)-, (2S-cis)-, 65, 203 Cyclohexanone, 5-methyl-2-[1-methyl-l-(phenylmethylthio)ethyl]-,... 

Cyclohexanamine, N-[(2-bromo-4,5-dimethoxyphenyl)methylene]-, 65, 108 Cyclohexanamine, N-[(2-iodo-4,5-dimethoxyphenyl)methylene]-, 65, 108 CYCLOHEXANE, 1,2-BIS(METHYLENE)-, 65, 90 Cyclohexane, 1,1-diethoxy-, 65, 17 CYCLOHEXANE, 1,2-DIMETHYLENE, 65, 90... 

However, this multistep procedure is experimentally complex. A simpler variation described in 199127 consists of the reaction of an aldehyde and a nitro compound in the presence of triethylamine, TBAF and tert-butyl-dimethylsilyl chloride. Under these conditions, nitro sugars are obtained in good yieds and higher diastereoselectivities than those afforded by the standard conditions. This procedure was used in several synthesis of 2-nitro-2-deoxyaldoses, as for the condensation of l,l-diethoxy-2-nitroethane and l,2 3,4-di-0-isopropylidene-a-D-galacto-hexodialdo-l,5-piranose.28 More recently, it was applied to the addition of ethyl nitroacetate to the D-glucose derived aldehyde 18, to give nitro sugar derivatives 26, key precursors of polysubstituted cyclohexane a-amino acids (Scheme 10).29... 

Fig. 26. UV spectra of l.l-diethoxy-2.4.6-triphenyl- -phosphorin in cyclohexane and in trifluoroacetic acid...

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