1135520-87-4

Upstream product

• 896469-22-0 (1-(2-fluorophenyl)-N-(4-methylbenzo[d]thiazol-2-yl)methanimine) 
• 762-04-9 phosphonic acid diethyl ester 
• 882182-49-2 ((2-fluorophenyl)(4-methylbenzothiazol-2-ylamino)methyl)phosphonic acid diethyl ester 

Relevant academic research and scientific papers

Asymmetric Synthesis of α-Amino Phosphonates by Using Cinchona Alkaloid-Based Chiral Phase Transfer Catalyst

A highly enantioselective nucleophilic addition of phosphite esters to imines catalyzed by a chiral phase-transfer catalyst has been developed. The process affords the hydrophosphonylation of imine products with quaternary stereocenters in good to high yields (up to 95 % yield) and excellent enantioselectivities (up to 99 % ee).

Enantioselective degradation of dufulin in four types of soil

In this study, enantioselective degradation of dufulin in four types of soil (Guiyang silty loam, Nanning silty clay, Hefei silty clay, and Harbin silty clay) was investigated under sterile and nonsterile conditions. Pesticide residues in soil samples were extracted with acetonitrile. S-(+)-Dufulin and R-(-)-dufulin were separated and determined on an amylose tris(3,5-dimethylphenylcarbamate) (Chiralpak IA) chiral column by normal phase high-performance liquid chromatography (HPLC). The absolute configurations of dufulin enantiomers were determined by obtaining experimental and computed circular dichroism spectra. Dufulin enantiomers were found to be configurationally stable in the selected soils, and no interconversion was observed during the incubation of enantiopure S-(+)- or R-(-)-dufulin under nonsterile conditions. Compared to the half-life (t1/2) of dufulin in sterile soils, the degradation rate was higher in nonsterile soils, which suggests that dufulin degradation can be attributed primarily to microbial activity in soils used for agricultural cultivation. Furthermore, enantiopure S-(+)-dufulin degraded more rapidly than its antipode. This suggests that use of enantiopure S-(+)-dufulin could exert less disturbance to soil bioactivity and contribute less to environmental pollution.

Asymmetric synthesis of α-aminophosphonates using the inexpensive chiral catalyst 1,1'-binaphthol phosphate

Asymmetric addition under mild conditions of dialkyl phosphites on aldimines derived from cinnamaldehyde catalyzed by the inexpensive chiral organocatalyst (R)-3,3'- [4-fluorophenyl]2-1,1'-binaphthol phosphate has been found effective to give n

Origins of enantioselectivity in the chiral Bronsted acid catalyzed hydrophosphonylation of imines

The results of an experimental and ONIOM-based computational investigation of the mechanism and the origins of enantioselectivity in the asymmetric synthesis of α-amino phosphonates by an enantioselective hydrophosphonylation of imines catalyzed by chiral