Disclosed is a fused ring compound and an application thereof. Disclosed is a fused ring compound represented by formula I, a pharmaceutically acceptable salt, a stereoisomer, a tautomer, an isotope compound, a crystal form, a nitrogen oxide, a solvate, or a solvate of the pharmaceutically acceptable salt thereof. The fused ring compound of the present invention has high P2X4 antagonistic activity, excellent selectivity, low toxicity and excellent metabolic stability.

##STR00001##

A compound having a structure represented by the general formula (I): ##STR00001##
(wherein n is 0 or 1;
R.sup.1 represents a hydrogen atom (only if n=0), a halogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group, an optionally substituted amino group, an optionally substituted phenyl group, a C1-C6 alkylthio group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group or a C7-C12 aralkyloxy group;
R.sup.2 represents —(CH.sub.2).sub.p—[O(CH.sub.2).sub.q].sub.r—X (wherein X is a halogen atom, p is an integer of 1 to 6, q is an integer of 1 to 4, and r is an integer of 0 to 4);
R.sup.3 represents a hydrogen atom, a C1-C6 alkyl group, a C7-C16 aralkyl group or a C6-C14 aryl group; and
R.sup.4 represents a hydrogen atom or a C1-C6 alkyl group), or a pharmaceutically acceptable salt thereof excels FAMT in terms of the tendency to accumulate intensively in cancer, the affinity for LAT1 and the selectivity for cancer, and can be labeled using an automated synthesizer in clinical settings, and therefore is useful as a highly versatile PET imaging agent.

A compound having a structure represented by the general formula (I): ##STR00001##
(wherein n is 0 or 1;
R.sup.1 represents a hydrogen atom (only if n=0), a halogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group, an optionally substituted amino group, an optionally substituted phenyl group, a C1-C6 alkylthio group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group or a C7-C12 aralkyloxy group;
R.sup.2 represents —(CH.sub.2).sub.p—[O(CH.sub.2).sub.q].sub.r—X (wherein X is a halogen atom, p is an integer of 1 to 6, q is an integer of 1 to 4, and r is an integer of 0 to 4);
R.sup.3 represents a hydrogen atom, a C1-C6 alkyl group, a C7-C16 aralkyl group or a C6-C14 aryl group; and
R.sup.4 represents a hydrogen atom or a C1-C6 alkyl group), or a pharmaceutically acceptable salt thereof excels FAMT in terms of the tendency to accumulate intensively in cancer, the affinity for LAT1 and the selectivity for cancer, and can be labeled using an automated synthesizer in clinical settings, and therefore is useful as a highly versatile PET imaging agent.

The present invention provides a method for preparing an intermediate of florfenicol, comprising: reacting p-methylthiobenzaldehyde with isocyanoacetate under catalysis of a chiral catalyst. In the reaction, the chiral product is oxidized to form a methylsulfone-substituted product which is subsequently deformylized to obtain the intermediate. In the method of the present invention, the chiral center of the intermediate is directly generated in the first step of reaction, and the yield of the first step reaches 75%-80%, which is significantly higher than the conventional chiral resolution methods (about 40% yield), and the product has high chiral purity. The method of the present invention does not use anhydrous copper sulfate that pollutes the environment, which reduces the environmental pressure. The compound of p-methylthiobenzaldehyde and the compound of isocyanoacetate are used to react to form a chiral intermediate, which has higher material availability and efficiency than linear synthesis methods.

The present invention provides a method for preparing an intermediate of florfenicol, comprising: reacting p-methylthiobenzaldehyde with isocyanoacetate under catalysis of a chiral catalyst. In the reaction, the chiral product is oxidized to form a methylsulfone-substituted product which is subsequently deformylized to obtain the intermediate. In the method of the present invention, the chiral center of the intermediate is directly generated in the first step of reaction, and the yield of the first step reaches 75%-80%, which is significantly higher than the conventional chiral resolution methods (about 40% yield), and the product has high chiral purity. The method of the present invention does not use anhydrous copper sulfate that pollutes the environment, which reduces the environmental pressure. The compound of p-methylthiobenzaldehyde and the compound of isocyanoacetate are used to react to form a chiral intermediate, which has higher material availability and efficiency than linear synthesis methods.

The present invention relates to the technical field of medicine, and specifically relates to the carboxylic acid compound represented by the chemical formula I or chemical formula II, and a pharmaceutically acceptable salt, a prodrug, and a solvate thereof, and a method for preparation thereof, as well as a pharmaceutical composition containing the described substances, and a use thereof.

##STR00001##

The present invention relates to the technical field of medicine, and specifically relates to the carboxylic acid compound represented by the chemical formula I or chemical formula II, and a pharmaceutically acceptable salt, a prodrug, and a solvate thereof, and a method for preparation thereof, as well as a pharmaceutical composition containing the described substances, and a use thereof.

##STR00001##

The present invention is related to the preparation and pharmaceutical use of substituted 3-haloallylamine derivatives as SSAO/VAP-1 inhibitors having the structure of Formula I, as defined in the specification: ##STR00001##
The invention also relates to methods of using compounds of Formula I, or pharmaceutically acceptable salt or derivatives thereof, for the treatment of a variety of indications, e.g., inflammatory diseases, ocular diseases, fibrotic diseases, diabetes-induced diseases and cancer.

The present invention is related to the preparation and pharmaceutical use of substituted 3-haloallylamine derivatives as SSAO/VAP-1 inhibitors having the structure of Formula I, as defined in the specification: ##STR00001##
The invention also relates to methods of using compounds of Formula I, or pharmaceutically acceptable salt or derivatives thereof, for the treatment of a variety of indications, e.g., inflammatory diseases, ocular diseases, fibrotic diseases, diabetes-induced diseases and cancer.

Aromatic amides are described, having general formula (I): ##STR00001##
suitably substituted and having a high fungicidal activity, together with their use for controlling phytopathogenic fungi of important agricultural crops.