摘要:
A process which comprises converting a alpha -amino acid ester into the corresponding imine to thereby protect the amino group of the ester, reacting the imine with a halomethyllithium to form an N-protected alpha -amino halomethyl ketone, and treating this N-protected alpha -amino halomethyl ketone with an acid to obtain a alpha -amino halomethyl ketone. This process is suitable for industrial production and permits economical and efficient production of alpha -amino halomethyl ketones and compounds related thereto.
摘要:
There is provided a process for producing particles of amine reaction product by means of a carrier having a melting point between 30 DEG C and 135 DEG C, optionally followed by a coating step. Processed amine reaction products and finished compositions incorporating such processed product are also herein provided.
摘要:
A hydroxyphenylamine compound can be converted, with high yield and high selectivity, into its corresponding quinoneimine by reacting the hydroxyphenylamine with a hypochlorite oxidation reactant.
摘要:
Benzyl alcohol derivatives represented by general formula (I) and a process for producing the same; wherein R represents cyano or -COOR (wherein R represents linear C1-5 alkyl); and a process for producing from the above benzyl alcohol derivatives intermediates which are useful in producing drugs such as sertraline useful as antidepressant.
摘要:
This invention relates to a novel improved process for preparation of N-[4-(3,4- dichlorophenyl) -3,4-dihydro-1(2H)- naphthalenylidene]methanamine from 4-(3,4-dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenone and monomethylamine.
摘要:
A phenylenediamine compound can be converted, with high selectivity, into its corresponding quinonediimine by reacting the phenylenediamine with a hypochlorite oxidation reactant.
摘要:
A phenylenediamine compound can be converted, with high selectivity, into its corresponding quinonediimine by reacting the phenylenediamine with hydrogen peroxide in the presence of a catalyst.
摘要:
The invention relates to a method for separating by distillation 6-aminocaproic acid nitrile from mixtures (I) containing 6-aminocaproic acid nitrile and an imine (II). Said method is characterized in that distillation takes place in a distillation column and that the distillation mixture remains on at least one level of the distillation column for an average period of at least 5 minutes.
摘要:
The invention relates to a method for separating by distillation all or part of an imine (III) from a mixture (II) containing an amine (I) and an imine (III). Said method is characterized in that a compound (IV) which under distillation conditions is inert in relation to the amine (I) and whose boiling point under distillation conditions lies above the boiling point of the amine, is added to the distillation mixture, and that distillation yields a mixture (VI) which essentially contains a compound (IV).