The present invention relates to an S-configuration-containing amino benzamide pyridazinone compound, a preparation method therefor, and a pharmaceutical composition and application thereof. Specifically, the present invention relates to a compound represented by the following general formula I or a pharmaceutically acceptable salt thereof, a preparation method therefor, and a pharmaceutical composition and application thereof. The S-configuration compound of the present application has very strong binding activity on class I histone deacetylase (HDAC1), and shows inhibitory activity on in-vitro proliferation of various tumor cells.

The present invention relates to an S-configuration-containing amino benzamide pyridazinone compound, a preparation method therefor, and a pharmaceutical composition and application thereof. Specifically, the present invention relates to a compound represented by the following general formula I or a pharmaceutically acceptable salt thereof, a preparation method therefor, and a pharmaceutical composition and application thereof. The S-configuration compound of the present application has very strong binding activity on class I histone deacetylase (HDAC1), and shows inhibitory activity on in-vitro proliferation of various tumor cells.

A carboxylic acid is transvinylated with vinyl ester to give a vinyl ester product and the corresponding acid of the vinyl ester in the presence of a catalyst, at a temperature of 100 C. to 170 C. and a pressure of 2 bar abs. to 15 bar abs., wherein the vinyl ester, the carboxylic acid and the catalyst are supplied to a reactor, the transvinylation reaction is conducted, and, on the completion of the transvinylation, the vinyl ester product is separated from the reaction mixture by distillation, characterized in that the reaction mixture is decompressed in a decompression vessel, the gaseous phase obtained is condensed and recycled into the reactor without further purification, and the liquid phase obtained is freed of vinyl ester and corresponding acid with a first distillation, and the vinyl ester product is separated from the reaction mixture in a further distillation step.

A carboxylic acid is transvinylated with vinyl ester to give a vinyl ester product and the corresponding acid of the vinyl ester in the presence of a catalyst, at a temperature of 100 C. to 170 C. and a pressure of 2 bar abs. to 15 bar abs., wherein the vinyl ester, the carboxylic acid and the catalyst are supplied to a reactor, the transvinylation reaction is conducted, and, on the completion of the transvinylation, the vinyl ester product is separated from the reaction mixture by distillation, characterized in that the reaction mixture is decompressed in a decompression vessel, the gaseous phase obtained is condensed and recycled into the reactor without further purification, and the liquid phase obtained is freed of vinyl ester and corresponding acid with a first distillation, and the vinyl ester product is separated from the reaction mixture in a further distillation step.

A carboxylic acid is transvinylated with vinyl ester to give a vinyl ester product and the corresponding acid of the vinyl ester in the presence of a catalyst, at a temperature of 100 C. to 170 C. and a pressure of 2 bar abs. to 15 bar abs., wherein the vinyl ester, the carboxylic acid and the catalyst are supplied to a reactor, the transvinylation reaction is conducted, and, on the completion of the transvinylation, the vinyl ester product is separated from the reaction mixture by distillation, characterized in that the reaction mixture is decompressed in a decompression vessel, the gaseous phase obtained is condensed and recycled into the reactor without further purification, and the liquid phase obtained is freed of vinyl ester and corresponding acid with a first distillation, and the vinyl ester product is separated from the reaction mixture in a further distillation step.

A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.

A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.

A high-yield process for preparing (4Z,7Z)-4,7-decadien-1-yl acetate, with reduced number of steps, without using a protecting group. A process for preparing (4Z,7Z)-4,7-decadien-1-yl acetate is provided, the process including at least the following steps: reducing a 10-halo-3,6-decadiyne of the general formula (1) to form a (3Z,6Z)-10-halo-3,6-decadiene of the general formula (2); and converting the (3Z,6Z)-10-halo-3,6-decadiene into (4Z,7Z)-4,7-decadien-1-yl acetate of the formula (4) having an acetoxy group in place of the halogen atom of the (3Z,6Z)-10-halo-3,6-decadiene.

##STR00001##

A high-yield process for preparing (4Z,7Z)-4,7-decadien-1-yl acetate, with reduced number of steps, without using a protecting group. A process for preparing (4Z,7Z)-4,7-decadien-1-yl acetate is provided, the process including at least the following steps: reducing a 10-halo-3,6-decadiyne of the general formula (1) to form a (3Z,6Z)-10-halo-3,6-decadiene of the general formula (2); and converting the (3Z,6Z)-10-halo-3,6-decadiene into (4Z,7Z)-4,7-decadien-1-yl acetate of the formula (4) having an acetoxy group in place of the halogen atom of the (3Z,6Z)-10-halo-3,6-decadiene.

##STR00001##

A high-yield process for preparing (4Z,7Z)-4,7-decadien-1-yl acetate, with reduced number of steps, without using a protecting group. A process for preparing (4Z,7Z)-4,7-decadien-1-yl acetate is provided, the process including at least the following steps: reducing a 10-halo-3,6-decadiyne of the general formula (1) to form a (3Z,6Z)-10-halo-3,6-decadiene of the general formula (2); and converting the (3Z,6Z)-10-halo-3,6-decadiene into (4Z,7Z)-4,7-decadien-1-yl acetate of the formula (4) having an acetoxy group in place of the halogen atom of the (3Z,6Z)-10-halo-3,6-decadiene. ##STR00001##