The present invention provides methods of synthesizing (6S,15S)-3,8,13,18-tetraazaicosane-6,15-diol and salts thereof.

The invention relates to a method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by reverse flotation, which method comprises the step of (c) adding a compound of formula I wherein R.sup.1 is C.sub.9-C.sub.22 alkyl or alkenyl, which is linear or branched, R.sup.2 is H, C.sub.1-C.sub.4 alkyl, which is linear or branched, R.sup.3 is —X—NH.sub.2, H or C.sub.1-C.sub.4 alkyl, which is linear or branched, and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, or a salt of a protonated compound of formula I and an anion, to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliaries to obtain an aqueous mixture. Furthermore, a method for manufacturing a specific group of compounds of formula I, i.e. compounds of formula 1-X wherein R.sup.1 is C.sub.9-C.sub.15 alkyl, which is linear or branched, R.sup.2 is H, R.sup.3 is —X—NH.sub.2 and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, is disclosed.

##STR00001##

The invention relates to a method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by reverse flotation, which method comprises the step of (c) adding a compound of formula I wherein R.sup.1 is C.sub.9-C.sub.22 alkyl or alkenyl, which is linear or branched, R.sup.2 is H, C.sub.1-C.sub.4 alkyl, which is linear or branched, R.sup.3 is —X—NH.sub.2, H or C.sub.1-C.sub.4 alkyl, which is linear or branched, and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, or a salt of a protonated compound of formula I and an anion, to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliaries to obtain an aqueous mixture. Furthermore, a method for manufacturing a specific group of compounds of formula I, i.e. compounds of formula 1-X wherein R.sup.1 is C.sub.9-C.sub.15 alkyl, which is linear or branched, R.sup.2 is H, R.sup.3 is —X—NH.sub.2 and X is C.sub.2-C.sub.4 alkylene, which is linear or branched, is disclosed.

##STR00001##

Method (M) for the preparation of an end compound from an internal ketone, said method comprising: —synthesizing the internal ketone by a process (P) for the decarboxylative ketonization of a fatty acid, a fatty acid derivative or a mixture thereof in a liquid phase with a metal compound as catalyst in the substantial absence of added solvent, wherein the fatty acid, fatty acid derivative or mixture thereof is added in sequential steps, the first step taking place at a temperature sequentially at a temperature from 100° C. to 270° C., —causing the internal ketone to react in accordance with a single or multiple chemical reaction scheme involving at least one reagent other than the internal ketone, wherein at least one product of the chemical reaction scheme is the end compound that is not further caused to be chemically converted into another compound.

Method (M) for the preparation of an end compound from an internal ketone, said method comprising: —synthesizing the internal ketone by a process (P) for the decarboxylative ketonization of a fatty acid, a fatty acid derivative or a mixture thereof in a liquid phase with a metal compound as catalyst in the substantial absence of added solvent, wherein the fatty acid, fatty acid derivative or mixture thereof is added in sequential steps, the first step taking place at a temperature sequentially at a temperature from 100° C. to 270° C., —causing the internal ketone to react in accordance with a single or multiple chemical reaction scheme involving at least one reagent other than the internal ketone, wherein at least one product of the chemical reaction scheme is the end compound that is not further caused to be chemically converted into another compound.

The present invention provides methods of synthesizing (6S,15S)-3,8,13,18-tetraazaicosane-6,15-diol and salts thereof.

The present invention provides methods of synthesizing (6S,15S)-3,8,13,18-tetraazaicosane-6,15-diol and salts thereof.

Described herein are compounds that disrupt the interaction between Fbxo48 and phosphorylated-AMPK.

Described herein are compounds that disrupt the interaction between Fbxo48 and phosphorylated-AMPK.

The invention relates to an absorbent solution and to a method using this solution for removing acid compounds contained in a gaseous effluent, comprising water and at least one diamine with general formula (I) as follows: ##STR00001## wherein: radicals R.sub.1, R.sub.2, R.sub.3 are each selected indiscriminately among a methyl radical and a hydroxyethyl radical, and at least one radical among R.sub.1, R.sub.2, R.sub.3 is a methyl radical.