Direct hydroxylation of benzene and aromatics with H<sub>2</sub>O<sub>2</sub> catalyzed by a self-assembled iron complex: evidence for a metal-based mechanism
作者:Giorgio Capocasa、Giorgio Olivo、Alessia Barbieri、Osvaldo Lanzalunga、Stefano Di Stefano
DOI:10.1039/c7cy01895a
日期:——
iminopyridine Fe(II) complex, easily prepared in situ by self-assembly of cheap and commercially available starting materials (2 picolylaldehyde, 2 picolylamine, and Fe(OTf)2) in a 2:2:1 ratio), is shown to be an effective catalyst for the direct hydroxylation of aromatic rings with H2O2 under mild conditions. This catalyst shows a marked preference for aromatic ring hydroxylation over lateral chain
Improved oxidation of aromatic and aliphatic hydrocarbons using rate enhancing variants of P450Bm3 in combination with decoy molecules
作者:Samuel D. Munday、Osami Shoji、Yoshihito Watanabe、Luet-Lok Wong、Stephen G. Bell
DOI:10.1039/c5cc09247g
日期:——
The addition of perfluorinated fatty acids to the rate accelerating KT2 mutant of P450Bm3 resulted in the highly active oxidation of cyclohexane and benzenes whilst maintaining the product selectivity.
Tricyclic alcohol compounds having the formula: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 is selected from the group consisting of hydrogen and methyl; wherein the dashed line is a carbon-carbon single bond or a carbon-carbon double bond; and wherein, when the dashed line is a carbon-carbon single bond, one of R.sub.2 or R.sub.3 is hydrogen; useful in preparing compositions for augmenting or enhancing the flavor and/or aroma of consumble products including foods, tobacco and perfumes.
Described is a process for producing an organic tricyclic alcohol having the formula: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 is selected from the group consisting of hydrogen and methyl; wherein the dashed line is a carbon-carbon single bond or a carbon-carbon double bond; and wherein when the dashed line is a carbon-carbon single bond, one of R.sub.2 or R.sub.3 is hydrogen.
The reactions of cyclohexa-2,4-dienones with cyclopentadiene
作者:Dilys M. Bratby、G. I. Fray
DOI:10.1039/j39710000970
日期:——
The reactions of cyclopentadiene with cyclohexa-2,4-dienones of general structure (VII) have been shown to proceed by initial diene addition of the hydrocarbon to the 4,5-double bond of the cyclohexadienone. The resulting adducts, which are derivatives of tricyclo[6,2,1,0]undeca-5,9-dien-4-one (III), rearrange even at room temperature to give products having the tricyclo[5,2,2,0]undeca-4,10-dien-8-one