[EN] PROCESS FOR THE PREPARATION OF A POLYUNSATURATED KETONE COMPOUND<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'UN COMPOSÉ POLYINSATURÉ DE CÉTONE
申请人:AVEXXIN AS
公开号:WO2015011206A1
公开(公告)日:2015-01-29
The invention relates to the manufacture of certain polyunsaturated compounds employing a particular application of the Mitsonobu reaction in the presence of at least one anti-oxidant. We have found a method of making a pharmaceutically-acccptable polyunsaturated ester or thioester compound directly, which can ultimately be converted to the advantageous ketone compounds, in which unwanted oxidation and cis/trans isomerization are substantially reduced or eliminated using particular Mitsonobu chemistry.
[EN] PROCESS FOR THE PREPARATION OF A POLYUNSATURATED KETONE COMPOUND<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN COMPOSÉ CÉTONE POLYINSATURÉ
申请人:AVEXXIN AS
公开号:WO2016116634A1
公开(公告)日:2016-07-28
A process for the preparation of a polyunsaturated thiol comprising: (1) reacting a polyunsaturated alcohol in the presence of a compound of formula R2-SO2Hal wherein R2 is a C1-20 hydrocarbyl group, such an C1-10 alkyl group, to form a polyunsaturated sulphonyl ester; (2) converting the polyunsaturated sulphonyl ester to a polyunsaturated thioester by reacting with an anion of formula -SC(=O)R4 wherein R4 is a C1-20 hydrocarbyl group; (3) converting the polyunsaturated thioester to form a polyunsaturated thiol optionally in the presence of an antioxidant, e.g. using a metal carbonate. (4) reacting said polyunsaturated thiol with a compound (LG)R3COX wherein X is an electron withdrawing group and R3 is an alkylene group carrying a leaving group (LG), such as LG-CH2- forming (I) where X is an electron withdrawing group and LG is a leaving group; optionally in the presence of an antioxidant, so as to form a polyunsaturated ketone compound.
PROCESS FOR THE PREPARATION OF A POLYUNSATURATED KETONE COMPOUND
申请人:AVEXXIN AS
公开号:US20160159737A1
公开(公告)日:2016-06-09
The invention relates to the manufacture of certain polyunsaturated compounds employing a particular application of the Mitsonobu reaction in the presence of at least one anti-oxidant. We have found a method of making a pharmaceutically-acceptable polyunsaturated ester or thioester compound directly, which can ultimately be converted to the advantageous ketone compounds, in which unwanted oxidation and cis/trans isomerization are substantially reduced or eliminated using particular Mitsonobu chemistry.
Process for the preparation of a polyunsaturated ketone compound
申请人:Avexxin AS
公开号:US10183911B2
公开(公告)日:2019-01-22
A process for the preparation of a polyunsaturated thiol comprising:
(1) reacting a polyunsaturated alcohol in the presence of a compound of formula R2—SO2Hal wherein R2 is a C1-20 hydrocarbyl group, such an C1-10 alkyl group, to form a polyunsaturated sulphonyl ester;
(2) converting the polyunsaturated sulphonyl ester to a polyunsaturated thioester by reacting with an anion of formula −SC(═O)R4 wherein R4 is a C1-20 hydrocarbyl group;
(3) converting the polyunsaturated thioester to form a polyunsaturated thiol optionally in the presence of an antioxidant, e.g. using a metal carbonate.
(4) reacting said polyunsaturated thiol with a compound (LG)R3COX wherein X is an electron withdrawing group and R3 is an alkylene group carrying a leaving group (LG), such as LG-CH2— forming
where X is an electron withdrawing group and LG is a leaving group; optionally in the presence of an antioxidant, so as to form a polyunsaturated ketone compound.