Aldehydes and ketones, on treatment with a low-valent cerium reagent, undergo reductive dimerization to produce the corresponding pinacols in high yield.
A versatile 13-step synthesis of 1,1′-dimethoxy-4,4′,5,5′-tetrakis(trimethylsilyloxy)bicyclohepta-3,3′,5,5′-dienyl (11) is described. 11 represents a potential building block for the construction of polycyclic cage compounds through dominoDiels−Alder and pincer reactions.
Renewable high-density spiro-fuels from lignocellulose-derived cyclic ketones
作者:Junjian Xie、Xiangwen Zhang、Lun Pan、Genkuo Nie、Xiu-Tian-Feng E、Qing Liu、Peng Wang、Yafei Li、Ji-Jun Zou
DOI:10.1039/c7cc05101h
日期:——
Renewable high-density spiro-fuels are synthesized from lignocellulose-derived cyclicketones for the first time, which show higher density, higher neat heat of combustion and lower freezing point compared with other biofuels synthesized from the same feedstock, and thus represent a new type of renewable high-density fuel attractive for practical applications.
Reaction of cycloalkanones with methyl 3-bromopropionate and Sml2 afforded formation of spiroanellated γ-lactones, pinacols and unprecedented 3-(1-hydroxycycloalkyl)-1-oxaspiro[n,m]alkan-2-ones.