The present invention provides a novel hydrogenation reaction and hydrogenolysis reaction, and does not require a large scale hydrogen supply equipment and a high-pressure facility for a respective reaction. The present invention relates to a method for producing a hydrogenated compound, characterized in reducing a compound to be hydrogenated (C) using a hydrogen-containing compound (A) and a reduced compound (B) to produce the hydrogenated compound (c).

The present invention relates to a process for the preparation of (1R,2S,5R)-1-amino-5-[2-(dihydroxyboranyl)ethyl]-2-[(dimethylamino)methyl]cyclohexane-1-carboxylic acid in anhydrous crystalline form A. The present invention further relates to methyl (1R,2R,4R)-2-acetamido-2-(tert-butylcarbamoyl)-4-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)ethyl)-cyclohexane-1-carboxylate which is the intermediate in this process.

The present invention relates to a process for the preparation of (1R,2S,5R)-1-amino-5-[2-(dihydroxyboranyl)ethyl]-2-[(dimethylamino)methyl]cyclohexane-1-carboxylic acid in anhydrous crystalline form A. The present invention further relates to methyl (1R,2R,4R)-2-acetamido-2-(tert-butylcarbamoyl)-4-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)ethyl)-cyclohexane-1-carboxylate which is the intermediate in this process.

Process for purifying a mixture of a diol and an acetal, comprising hydrolysing the mixture with formation of the relative aldehydes/ketones and diols; and reducing the aldehydes/ketones present in the hydrolysis product by adding a reducing agent, resulting in a diol of the same species as present in the starting mixture.

Process for purifying a mixture of a diol and an acetal, comprising hydrolysing the mixture with formation of the relative aldehydes/ketones and diols; and reducing the aldehydes/ketones present in the hydrolysis product by adding a reducing agent, resulting in a diol of the same species as present in the starting mixture.

The present invention is related to a catalytic process, which includes catalytic compositions for depolymerisation and deoxygenation of lignin contained in the biomass for obtaining aromatic hydrocarbons. The catalytic composition consists of at least one non-noble element from group VIIIB of the periodic table supported on a mesoporous matrix composed of an inorganic oxide, which can be alumina surface-modified with a second inorganic oxide with the object of inhibiting the interaction between the active component and the support. The process of lignin depolymerisation consists of dissolving lignin in a mixture of protic liquids, reacting it|a reaction system by batch or in continuous flow at inert and/or reducing atmosphere, at a temperature of between 60 to 320 C. and a pressure of from 5 to 90 kg/cm.sup.2. When the reaction is developed into a batch system, oxygenated aromatic hydrocarbons are mainly produced, both by thermal as well as catalytic depolymerisation, whereas in a continuous flow reaction system, deoxygenated aromatic hydrocarbons are produced.

The present invention is related to a catalytic process, which includes catalytic compositions for depolymerisation and deoxygenation of lignin contained in the biomass for obtaining aromatic hydrocarbons. The catalytic composition consists of at least one non-noble element from group VIIIB of the periodic table supported on a mesoporous matrix composed of an inorganic oxide, which can be alumina surface-modified with a second inorganic oxide with the object of inhibiting the interaction between the active component and the support. The process of lignin depolymerisation consists of dissolving lignin in a mixture of protic liquids, reacting it|a reaction system by batch or in continuous flow at inert and/or reducing atmosphere, at a temperature of between 60 to 320 C. and a pressure of from 5 to 90 kg/cm.sup.2. When the reaction is developed into a batch system, oxygenated aromatic hydrocarbons are mainly produced, both by thermal as well as catalytic depolymerisation, whereas in a continuous flow reaction system, deoxygenated aromatic hydrocarbons are produced.

Provided are a method for producing 3-methylglutaraldehyde in a good yield under a mild condition and a novel acetal compound which is useful for carrying out the foregoing method. The method is a production method of 3-methylglutaraldehyde including a step of hydrolyzing a compound represented by the following general formula (1): ##STR00001##
wherein R.sup.1 and R.sup.2 each independently represent an alkyl group having 1 to 6 carbon atoms, or are mutually coupled to represent an alkylene group having 2 to 6 carbon atoms.

Provided are a method for producing 3-methylglutaraldehyde in a good yield under a mild condition and a novel acetal compound which is useful for carrying out the foregoing method. The method is a production method of 3-methylglutaraldehyde including a step of hydrolyzing a compound represented by the following general formula (1): ##STR00001##
wherein R.sup.1 and R.sup.2 each independently represent an alkyl group having 1 to 6 carbon atoms, or are mutually coupled to represent an alkylene group having 2 to 6 carbon atoms.

Provided are a method for producing 3-methylglutaraldehyde in a good yield under a mild condition and a novel acetal compound which is useful for carrying out the foregoing method. The method is a production method of 3-methylglutaraldehyde including a step of hydrolyzing a compound represented by the following general formula (1): ##STR00001##
wherein R.sup.1 and R.sup.2 each independently represent an alkyl group having 1 to 6 carbon atoms, or are mutually coupled to represent an alkylene group having 2 to 6 carbon atoms.