Fast oxidation of secondary alcohols by the bromate-bromide system using cyclic microwave heating in acidic water
作者:Sanna Pääkkönen、Jouni Pursiainen、Marja Lajunen
DOI:10.1016/j.tetlet.2010.10.009
日期:2010.12
We report an improved, gentle, cyclic microwave activation technique for the oxidation of secondaryalcohols using nonhazardous hypobromous acid (BrOH) as the reagent in acidic water. Several aliphatic and aromatic secondaryalcohols were successfully oxidized to the corresponding ketones using this technique in high yields and with only minor amounts of side products.
EXPERIMENTAL AND THEORETICAL STUDIES ON THE REACTIVITIES OF PARTIALLY AND FULLY FLUORINATED PRIMARY ALKYL RADICALS φ φIssued as NRC No. 40813
作者:Michael D. Bartberger、William R. Dolbier、J. Lusztyk、K.U. Ingold
DOI:10.1016/s0040-4020(97)00332-3
日期:1997.7
Absoluterate constants for hydrogen abstraction from n-Bu3SnH by a number of partially-fluorinated and fully fluorinated n-alkyl radicals have been measured. The C-H and C-C bond dissociation energies for a number of pertinent hydrofluorocarbons have been calculated by DFT. The rate data are compared with those for addition of the same radicals to styrene, and the reactivities of these radicals are
NOVEL INDOLIZINE DERIVATIVES, METHOD FOR PREPARING SAME, AND THERAPEUTIC COMPOSITIONS COMPRISING SAME
申请人:GAUTIER Patrick
公开号:US20080287485A1
公开(公告)日:2008-11-20
The present invention is directed to compounds of formula (I):
described as novel indolizine derivatives and to a method for their preparation along with pharmaceutical compositions thereof whose substituents are as described in the specification.
Reaction of frangula-emodin with α-bromoalkylmethylketones
作者:T. V. Kharlamova
DOI:10.1007/s10600-007-0146-6
日期:2007.7
The alkylation of 1,6,8-trihydroxy-3-methylanthraquinone (frangula-emodin) by α-bromoalkylmethylketones was investigated. Hydroxyls in the 1-and 8-positions of the β-derivatives were O-acylated. The compositions and structures of the prepared compounds were confirmed by elemental analysis and UV, IR, PMR, and 13C NMR spectroscopy.