摘要:
The present invention relates to a new process for preparing diisopropyl {[1-(hydroxymethyl)-cyclopropyl]oxy}methylphosphonate (2), which is a key intermediate for synthesizing an antiviral (particularly, against hepatitis B virus) nucleoside analogue. The present invention also relates to new intermediates, and a process for preparing the antiviral nucleoside analogue from the compound (2) prepared according to the present invention.
摘要:
Disclosed is a process for preparing a compound of the following formula (2): including the steps of reacting a compound of the following formula (4): with trityl chloride to prepare trityloxy-acetic acid ethyl ester of the following formula (8): reacting the compound of formula (8) with ethyl magnesium halide to prepare 1-trityloxymethyl-cyclopropanol of the following formula (9): combining the 1-trityloxymethyl-cyclopropanol of formula (9) with diisopropylbromo-methylphosphonate in a solvent in the presence of a base to prepare (1-trityloxymethyl-cyclopropoxymethyl)-phosphonic acid diisopropyl ester of the following formula (10): as a solid form, and converting the trityl group of the compound of formula (10) into a hydroxyl group.
摘要:
The present invention relates to a new process for preparing diisopropyl {[1-(hydroxymethyl)-cyclopropyl]oxy}methylphosphonate (2), which is a key intermediate for synthesizing an antiviral (particularly, against hepatitis B virus) nucleoside analogue. The present invention also relates to new intermediates, and a process for preparing the antiviral nucleoside analogue from the compound (2) prepared according to the present invention.
摘要:
The present invention relates to a fungicidal composition which comprises N-(&agr;-cycno-2-thenyl)-4-ethyl-2-(ethylamino)-5-thiazolecarboxamide (ethaboxam) and as an adjuvant polyoxyalkylene alkyl ether.
摘要:
The present invention relates to a method for preparing S-HGB ((S)-3-hydroxy-γ-butyrolactone) using hydrolase, and more particularly to a method for preparing S-HGB in a high purity by hydrolyzing S-BBL ((S)-β-benzoyloxy-γ-butyrolactone) in the presence of hydrolase. According to the present invention, the S-HGB having an optical purity can be obtained in a high yield under simple process conditions without requiring reaction conditions of high pressure and high temperature or complex operating conditions by hydrolyzing S-BBL with hydrolase.
摘要:
The present invention relates to a stable microemulsion composition comprising metalaxyl-M(methyl N-(methoxyacetyl)N-(2,6-xylyl)-D-alaninate) used for agricultural fungicide as active ingredient. Specifically, the microemulsion composition of the present invention is characterized in that the phase is not destroyed at a wide range of temperature during storage to remain stable, even if the composition comprises a high concentration of active ingredient. Also, the microemulsion composition of the present invention can form stable microemulsion in a wide range of dilution concentration, even if the composition is diluted with water.
摘要:
A process for pre ing a compound represented by formula (I), wherein R1 represents straight-chain or branched C1-5 alkyl, C1-5 haloalkyl, or C3-6 cycloalkyl, and R2 represents C1-3 alkyl or C1-3 haloalkyl.
摘要:
A process for preparing a compound represented by formula (I), wherein R1 represents straight-chain or branched C1-5 alkyl, C1-5 haloalkyl, or C3-6 cycloalkyl, and R2 represents C1-3 alkyl or C1-3 haloalkyl.