430534-94-4

Upstream product

• 77771-02-9 3-bromo-4-fluorobenzaldehyde 
• 202865-63-2 3-bromo-4-fluorobenzaldehyde oxime 

Downstream Products

• 1442459-68-8 3-(3-bromo-4-fluorophenyl)-5-octylisoxazole 
• 1442459-70-2 3-(3-bromo-4-fluorophenyl)-5-hexylisoxazole 

Relevant academic research and scientific papers

Novel selective ido1 inhibitors with isoxazolo[5,4-d]pyrimidin-4(5h)-one scaffold

Indoleamine 2,3-dioxygenase 1 (IDO1) is a promising target in immunomodulation of several pathological conditions, especially cancers. Here we present the synthesis of a series of IDO1 inhibitors with the novel isoxazolo[5,4-d]pyrimidin-4(5H)-one scaffold. A focused library was prepared using a 6-or 7-step synthetic procedure to allow a systematic investigation of the structure-activity relationships of the described scaffold. Chemistry-driven modifications lead us to the discovery of our best-in-class inhibitors possessing p-trifluoromethyl (23), p-cyclohexyl (32), or p-methoxycarbonyl (20, 39) substituted aniline moieties with IC50 values in the low micromolar range. In addition to hIDO1, compounds were tested for their inhibition of indoleamine 2,3-dioxygenase 2 and tryptophan dioxygenase, and found to be selective for hIDO1. Our results thus demon-strate a successful study on IDO1-selective isoxazolo[5,4-d]pyrimidin-4(5H)-one inhibitors, defining promising chemical probes with a novel scaffold for further development of potent small-molecule immunomodulators.

Discovery of Natural Product-Based Fungicides (II): Semisynthesis and Biological Activity of Sarisan Attached 3-Phenylisoxazolines as Antifungal Agents

Many phytopathogenic fungi cause severe damage to crop yields. In continuation of our research aimed at the discovery and development of natural products-based fungicides, a series of thirty-one sarisan attached 3-phenylisoxazolines were synthesized and evaluated for their antifungal activities against five phytopathogenic fungi (B. cinerea, C. lagenarium, A. solani, F. solani, and F. graminearum). Among all title sarisan derivatives, compounds IV2, IV14 and IV23 showed potent antifungal activity against some phytopathogenic fungi. In particular, compound IV2 exhibited a broad-spectrum and more potent antifungal activity against A. solani, F. solani, and F. graminearum than the commercial fungicide Hymexazol. In addition, compounds IV2, IV14 and IV23 also displayed relative low toxicity on normal NRK-52E cells. This work will give some insights into the development of sarisan derivatives as new fungicide candidates in plant protection.

Preparation technology for 3-aryl-4-nitro isoxazole compound

The invention discloses a preparation technology for a 3-aryl-4-nitro isoxazole compound. The preparation technology comprises the following steps: synthesizing a compound shown as formula II through the nucleophilic addition of hydroxylamine hydrochloride and the compound shown as formula I used as the raw material; acquiring the compound shown as formula III through the substitution reaction of the compound shown as formula II and N-chlorosuccinimide; preparing 1-dimethyl amino-2-nitro ethylene through the reaction of N,N-dimethylformamide dimethyl acetal and nitromethane used as the raw material; and acquiring a target product 3-aryl-4-nitro isoxazole compound through the cyclization reaction of the compound shown as formula III and 1-dimethyl amino-2-nitro ethylene. The raw materials in the synthesis route are low in cost and easily acquired, the operation condition is mild and is easily controlled, the product is easily purified and the preparation technology is a new method for synthesizing the 3-aryl-4-nitro isoxazole compound.

Montmorillonite clay Cu(II) catalyzed domino one-pot multicomponent synthesis of 3,5-disubstituted isoxazoles

A simple and efficient one-pot multicomponent approach for the synthesis of 3,5-disubstituted isoxazoles directly from corresponding aldehydes and terminal alkynes using recyclable montmorillonite clay supported Cu(II)/NaN3 catalytic system under aqueous conditions have been developed. The 'domino' one-pot MCR approach involves hydroxyamination of aldehydes followed by chlorination and then generation of reactive 'nitrile oxide' which undergoes 1,3-dipolar cycloaddition with alkynes to produce 3,5-disubstituted isoxazoles. The method is operationally simple, regioselective, economical, and possesses excellent functional group compatibility to synthesize structurally diverse isoxazoles in good yields.