摘要:
A method comprising synthesizing a cyclic organic compound via reaction of an unsubstituted or substituted cyclopentene with an unsubstituted or substituted acrylic acid in the presence of phosphoric and/or sulfonic acid reagent to make the cyclic organic compound. Also, a method of synthesizing a ligand for a transition metal, and a related substituted ligand-metal complex and catalyst, from the unsubstituted or substituted cyclopentene and unsubstituted or substituted acrylic acid. Also, the cyclic organic compound, ligand, and substituted ligand-metal complex and catalyst synthesized thereby. Also a method of polymerizing an olefin with the catalyst to give a polyolefin, and the polyolefin made thereby.
摘要:
A method of producing higher alkanones, preferably 6-undecanone, from ethanol and/or acetate, may include: (a) contacting the ethanol and/or acetate with at least one microorganism capable of carrying out carbon chain elongation to produce hexanoic acid and/or an ester thereof from the ethanol and/or acetate; (b) extracting the hexanoic acid and/or ester thereof from the contacting (a) using at least one extractant in an aqueous medium, the extractant including at least one alkyl-phosphine oxide and at least one C12+ alkane; or at least one trialkylamine and at least one C12+ alkane; and (c) contacting the extracted hexanoic acid and/or ester thereof from (b) with at least one ketonization catalyst and eventually a further C1 to C22 alkanoic acid under suitable reaction conditions for chemical ketonization of hexanoic acid and eventually the further alkanoic acid to a higher alkanone, preferably 6-undecanone.
摘要:
The present invention provides a process for preparation of {(2E,4E,6E,8E)-9-(4-methoxy-2,3,6-trimethyl)phenyl-3,7-dimethyl-nona-2,4,6,8}tetraenoate, an acitretin intermediate of formula (VI) with trans isomer≧97%, comprising of reacting 3-formyl-crotonic acid butyl ester of formula (V), substantially free of impurities, with 5-(4-methoxy-2,3,6-trimethylphenyl)-3-methyl-penta-2,4-diene-1-triphenyl phosphonium bromide of formula (IV) and isolating resultant compound of formula (VI), treating the filtrate with iodine for isomerization of the undesired cis intermediate and finally obtaining acitretin (I), with desired trans isomer≧97%.
摘要:
In one embodiment, the present application discloses methods to selectively synthesize higher alcohols and hydrocarbons useful as fuels and industrial chemicals from syngas and biomass. Ketene and ketonization chemistry along with hydrogenation reactions are used to synthesize fuels and chemicals. In another embodiment, ketene used to form fuels and chemicals may be manufactured from acetic acid which in turn can be synthesized from synthesis gas which is produced from coal, biomass, natural gas, etc.
摘要:
Processes for producing long chain ethers from long chain secondary alcohols using fatty acid containing feedstocks. In an embodiment, a long chain secondary alcohol may be reacted with a primary alcohol, a secondary alcohol, or an olefin to form a long chain ether. In another embodiment, a long chain secondary alcohol or the corresponding alkoxide may be reacted with an alkyl halide to form a long chain ether. In yet a further embodiment, a long chain secondary alcohol may be converted to a halide, and the halide may be reacted with a second alcohol or the corresponding alkoxide to form a long chain ether. Long chain ether compositions of matter are also disclosed.
摘要:
The present invention relates to a process for preparing 2-cyclo-alkenones of the formula I ##STR1## which comprises subjecting a 2-alkoxycycloalkanone and/or a 2-hydroxyalkanone ketal, in which n is an integer from 0 to 20, m is 0, 1, 2 or 3 and R is alkyl, alkylaryl, aryl, arylalkyl, alkenyl or alkynyl, to an elimination reaction in the gas phase on an acidic heterogeneous catalyst.
摘要:
Compounds represented by general formulas (I) and (II), useful as the intermediates for agricultural chemicals, particularly herbicidal compounds, wherein R.sup.1 and R.sup.2 represent each hydrogen, alkyl or COOR.sup.3 :R.sup.3 represents alkyl: and R.sup.4 represents alkyl.
摘要:
Cyclic ketones of the general formula I ##STR1## where n is an integer from 4 to 6, are prepared by reacting aliphatic dicarbonitriles of the general formula IINC--(CH.sub.2).sub.n --CN (II),where n has the abovementioned meaning, in the gas phase in the presence of water at from 250.degree. to 500.degree. C. on solid oxide catalysts.
摘要:
Novel 1,3-Diaryl cyclopentanes of the following general formula were prepared. ##STR1## These compounds were found to have potent and specific PAF (Platelet Activating Factor) antagonistic activities and as such useful in the treatment or amelioration of various diseases or disorders mediated by the PAF, for example, hypotension, inflammation, nephritis, stroke and other cardiovascular disorders, asthma, allergic and skin diseases, peptic or stomach ulcer, shock, lung edema, psoriasis, adult respiratory distress syndrome, pain including dental pain, and aggregation of platelets.
摘要:
Disclosed is a method for the preparation of ketones by a catalytic vapor phase reaction of using reactants such as ketones with carboxylic acids and/or carboxylic acid precursors. An example of such a reaction is that of acetone with pivalic acid over a ceria-alumina catalyst at a temperature of nearly 470.degree. C. to produce pinacolone.