The invention relates to a process for preparing triaryl organoborates proceeding from organoboronic esters in the presence of an n-valent cation 1/n K.sup.n+, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.

The present invention relates to a method of directly preparing a dicarbamate compound from a diamine compound, and more particularly to a method of directly preparing a dicarbamate compound by reacting a diamine compound with an alcohol compound in the presence of a mixed gas of carbon monoxide (CO) and oxygen (O.sub.2) using a Pd/MO.sub.x catalyst configured such that a palladium (Pd) active metal is supported on a metal oxide or metalloid oxide carrier.

The present invention relates to a method of directly preparing a dicarbamate compound from a diamine compound, and more particularly to a method of directly preparing a dicarbamate compound by reacting a diamine compound with an alcohol compound in the presence of a mixed gas of carbon monoxide (CO) and oxygen (O.sub.2) using a Pd/MO.sub.x catalyst configured such that a palladium (Pd) active metal is supported on a metal oxide or metalloid oxide carrier.

The objective of the present invention is to provide a method for producing an isocyanate compound safely and efficiently. The method for producing an isocyanate compound according to the present invention is characterized in comprising the steps of irradiating a high energy light to a halogenated methane at a temperature of 15° C. or lower in the presence of oxygen, and further adding a primary amine compound to be reacted without irradiating a high energy light.

The objective of the present invention is to provide a method for producing an isocyanate compound safely and efficiently. The method for producing an isocyanate compound according to the present invention is characterized in comprising the steps of irradiating a high energy light to a halogenated methane at a temperature of 15° C. or lower in the presence of oxygen, and further adding a primary amine compound to be reacted without irradiating a high energy light.

The disclosure provides recording materials including aromatic substituted alkane-core derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed, including Formula I. When used in Bragg gratings applications, the monomers and polymers disclosed lead to materials with higher refractive index, low birefringence, and high transparency. The disclosed derivatized monomers and polymers can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer.

The present invention relates to a method of directly preparing a dicarbamate compound from a diamine compound, and more particularly to a method of directly preparing a dicarbamate compound by reacting a diamine compound with an alcohol compound in the presence of a mixed gas of carbon monoxide (CO) and oxygen (O.sub.2) using a Pd/MO.sub.x catalyst configured such that a palladium (Pd) active metal is supported on a metal oxide or metalloid oxide carrier.

The present invention relates to a method of directly preparing a dicarbamate compound from a diamine compound, and more particularly to a method of directly preparing a dicarbamate compound by reacting a diamine compound with an alcohol compound in the presence of a mixed gas of carbon monoxide (CO) and oxygen (O.sub.2) using a Pd/MO.sub.x catalyst configured such that a palladium (Pd) active metal is supported on a metal oxide or metalloid oxide carrier.

A process for obtaining {{6-[(diethylamino)methyl]naphthalen-2-yl}methyl [4-(hydroxycarbamoyl)phenyl]carbamate and/or pharmaceutically acceptable salts thereof having high purity is described. This process allows to obtain a product having an amount of any single unknown impurity equal to or less than 0.10%, as well as a product having a purity greater than 99.5%, preferably equal to or greater than 99.6%.

An HPLC method for determining the purity of the product and possible impurities thereof is also described.

A process for obtaining {{6-[(diethylamino)methyl]naphthalen-2-yl}methyl [4-(hydroxycarbamoyl)phenyl]carbamate and/or pharmaceutically acceptable salts thereof having high purity is described. This process allows to obtain a product having an amount of any single unknown impurity equal to or less than 0.10%, as well as a product having a purity greater than 99.5%, preferably equal to or greater than 99.6%.

An HPLC method for determining the purity of the product and possible impurities thereof is also described.