摘要:
New dehydrotocopherols, namely cis- and trans- 3',4'-dehydrotocopherol; cis- and trans- 4',5'-dehydrotocopherol; and 4',4'-a-dehydrotocopherol, and new didehydrotocopherols, namely cis- and trans- 3',4'-11',12'-didehydrotocopherol; cis- and trans- 4',5'-11',12'-didehydrotocopherol; and 4',4'a-11',12'-didehydrotocopherol, are useful intermediates in the preparation of Vitamin E.These intermediates are prepared by reacting trimethylhydroquinone under acid catalysis with certain C.sub.20 intermediates, namely: ##STR1## where R represnts a 3,7-dimethyloctyl or a 3,7-dimethyl-6-octenyl radical and X is halogen, hydroxyl, acetate, C.sub.1-4 alkanoate, C.sub.3-4 alkenoate, aralkenoate and benzoate.
摘要:
A process for increasing the fuel value of a gas mixture of carbon monoxide and hydrogen by converting part of the hydrogen and part of the carbon in the carbon monoxide of the gas mixture to methane, which comprises continuously introducing the gas mixture into a fluid bed in the presence of iron under conditions of pressure and temperature which promote the reduction of carbon monoxide to carbon, the formation of iron carbide from the iron and carbon, and the formation of methane and iron from iron carbide and hydrogen, and continuously removing from the fluid bed a methane enriched gas mixture including carbon monoxide and hydrogen having a substantially increased fuel value over the gas mixture introduced into the fluid bed.
摘要:
The invention relates to a process for the preparation of ethylenic compounds and to certain novel ethylenic compounds produced by the process.The process comprises the reaction of an appropriate carbonyl compound with a sulphone to obtain an alcohol sulphone which is then reduced to obtain the desired ethylenic compound.
摘要:
The invention relates to a process for the grafting a chain on to the 10-position carbon atom of a tricyclene skeleton, more particularly for producing 10-substituted stereospecific tricyclenes, especially cis-.alpha.-santalene and cis-.alpha.-santalol. The process involves the production of a sulphone of the tricyclene, the reaction of the sulphone with the halogenated derivative of the desired side chain and desulphonating the product.
摘要:
Process for the preparation of poly-unsaturated hydrocarbons, in particular undeca-1,3,5-triene, which comprises reacting a quaternary phosphonium salt with hexanal.The product obtained in accordance with the process of the invention is a useful perfuming ingredient.
摘要:
There are provided novel triene hydrocarbons, having at least two conjugated double bonds, and being of the general formula IN WHICH A is a radical consisting of a ring containing an endomethylene group; B may be both a linear alkadiene radical and a substituted and unsubstituted alkene or cycloalkene radical; Ro may be hydrogen, an aryl or an alkyl radical, n is a number ranging from 0 to 3; and m is 0 or 1. If n is not 0, m is 0; if n is 0, m is 0 or 1.
摘要:
HIGHLY BRANCHED HYDROCARBONS SUITABLE AS HIGH-OCTANE FUELS CAN BE OBTAINED RAPIDLY AND EFFICIENTLY BY A COUPLING REACTION IN WHICH REACTIVE ORGANO-HALIDES ARE CONTACTED WITH AN ORGANO ALUMINUM, UNDER REACTION CONDITIONS, IN A NON-REACTIVE SOLVENT.
摘要:
THE PROCESS INVOLVES THE INTRODUCTION OF AN ORGANIC GROUP INTO AN ETHYLENICALLY UNSATURATED HYDROCARBON. AS AN EXAMPLE, A MIXTURE OF DIPHENYLMERCURY, LITHIUM PALLADIUM CHLORIDE AND ETHYLENE IS FORMED IN ACETONITRILE AS A SOLVENT. THIS RESULTS IN THE FORMATION OF AN UNSTABLE ADDUCT BETWEEN THE ETHYLENE AN PHENYL-PALLADIUM CHLORIDE. DECOMPOSITION OF THE ADDUCT BY MAINTAINING IT ABOVE ITS DECOMPOSITION TEMPERATURE PROVIDES STYRENE AS THE PRODUCT.