摘要:
The present invention provides convergent processes for preparing beta-elemene, and analogues thereof. Also provided are analogues related to beta-elemene and intermediates useful for preparing the same. The present invention further provides novel compositions based on analogues of beta-elemene and methods for the treatment of cancer, such as brain tumor, lung cancer, colorectal cancer, gastric intestional cancer, and stomach cancer.
摘要:
The present invention provides convergent processes for preparing (−)-beta-elemene, (−)-beta-elemenal, (−)-beta-elemenol, and (−)-beta-elemene fluoride and analogues thereof. Also provided are intermediates useful for preparing (−)-beta-elemene. The present invention further provides novel compositions based on analogues of (−)-beta-elemene, (−)-beta-elemenal, (−)-beta-elemenol, (−)-beta-elemene fluoride and methods for the treatment of cancer, such as brain tumor, lung cancer, breast cancer, prostate cancer, ovarian cancer, colorectal cancer, gastric intestional cancer, and stomach cancer. The inventors propose a combination therapy using 1) one or more of the following anti-cancer agents: including, but not limited to, Cisplatin, 5-FU, Taxol, Taxol derivatives, and any anti-cancer agent, and 2) one or more of the following (−)-beta-elemene and its analogs, including (−)-beta-elemene, (−)-beta-elemenal, (−)-beta-elemenol, (−)-beta-elemene fluoride, and their analogs, and (−)-beta-elemene's intermediate in its chemical synthesis, for the treatment of cancer, especially for the treatment of brain tumor, lung cancer, ovarian cancer, bladder cancer, cervical cancer, colon cancer, breast cancer, and prostate cancer.
摘要:
The present invention relates to a process for the preparation of cyclopropaneacetylene by reacting a ketophosphonate with a diazo-transfer reagent in the presence of non-nucleophilic base in an aprotic solvent to generate a reaction mixture containing a ketodiazophosphonate compound and then reacting the reaction mixture with cyclopropanecarboxaldehyde in a non-nucleophilic base and a protic solvent to yield cyclopropaneacetylene.
摘要:
A novel process is disclosed for preparing hydrocarbon mixtures from methanol or trimethyl phosphate. The process comprises heating the methanol or trimethyl phosphate with phosphorus pentoxide, polyphosphoric acid or a species of polyphosphoric acid intermediate between the two reagents at a temperature of circa. 185.degree. C. to 300.degree. C. The hydrocarbon mixtures obtained are useful fuel and lubricant compositions.
摘要:
Provided in the present invention is a method for synthesizing 2,7-dimethyl-2,4,6-octatriene-1,8-dialdehyde. The synthesis method comprises the following steps: (1) adding acetaldehyde diethyl acetal and ethyl-(1-propenyl)-ether under the effect of a catalyst to produce 1,1,3-triethoxy-2-methyl-butane; (2) pyrolysis synthesizing 1,1,3-triethoxy-2-methyl-butane under the catalytic effects of isoquinoline and p-Toluenesulfonic acid to produce 1-methoxy-2-methyl-1,3-butadiene; (3) dissolving 1-methoxy-2-methyl-1,3-butadiene in anhydrous ethanol solvent for synthesis with a phase transfer catalyst, cetyl-trimethyl ammonium bromide, and a chlorinating agent, trichloroisocyanuric acid, to generate 4,4-diethoxy-3-methyl-1-chloro-butene; (4) combining 4,4-diethoxy-3-methyl-1-chloro-butene with a triphenylphosphine salt to produce a phosphonium salt; and (5) condensing the phosphonium salt under the effects of hydrogen peroxide in conjunction with sodium carbonate solution to generate 1,1,8,8-tetramethyl-2,7-dimethyl-2,4,6-octatriene; then hydrolyzing under acidic conditions to synthesize 2,7-dimethyl-2,4,6-octatriene-1,8-dialdehyde. The present invention has a simple process route, is easy to operate, and has mild conditions, great yield, and great industrial value.
摘要:
The present invention provides a process for preparing a vinylaromatic compound comprising reacting an arylmetal reagent selected from arylmagnesium reagents and aryllithium reagents with a vinylphosphate in the presence of a palladium catalyst. The present invention also provides a process for preparing a vinylphosphate comprising reacting an enolizable ketone with a sterically hindered Grignard reagent and a halophosphate diester.
摘要:
Compounds of the general formula R--CH.dbd.CH--W--CH.dbd.CH--R.sup.1 are described in which R and R.sup.1 are independently phenyl, diphenyl, naphthyl, indyl, tetrahydronaphthyl or acenaphthenyl and W is divalent phenyl, diphenyl, naphthyl, tetrahydronaphthyl or acenaphthenyl group, which groups may be substituted, the compounds containing at least one non-aromatic ring. Such compounds are useful as optical whitening agents, for example in textile material or paper.