St Pharm Co., Ltd.

Dong-a Pharmaceutical Co., Ltd

Hyosung Chemical Corporation

Geun Jho Lim

Sun Ki Chang

Chang Ho Byeon

Hoe Jin Yoon

Hyun Woo Baek

Yeong Hun Kim

Moon Soo Kim

Jae Hun Kim

Dong Sung Kim

Sang Deuk Lee

Moohi Yoo

Soon Hoe Kim

Mi Won Son

Won Bae Kim

Jae Sung Yang

Hee Chan Shin

Hong Jun Kim

Joong In Lim

Byoung Ok Ahn

Seok Hun Woo

Ik Yon Kim

Byung Kwon Ryu

Jae Yoon Shim

Hae Souk Cho

Jong Moon Park

YunHee Choi

Min Kyu Kim

Hyeon Jin Lee

Tae Young Oh

In Hyeok Baek

Ji Hwan Choi

Jun Hyun Oh

Sang Kyu Kang

Sun Kue Kim

Nam Gi Baik

The present disclosure provides a method for preparing ((2,2-dimethyl-1,3-dioxane-5,5-diyl)bis(methylene))bis(bis(2-methoxyphenyl)phosphine), a ligand for a polyketone polymerization catalyst, under mild conditions with high purity and high yield. Therefore, the preparation method of the present disclosure can be easily applied to mass production.

Method for preparing ligand for polyketone polymerization catalyst

Disclosed is a method of preparing an intermediate for an oxazolidinone derivative, which enables 5-bromo-2-(2-methyl-2H-tetrazol-5-yl)pyridine to be produced at high yield and high purity, thus exhibiting high preparation efficiency under optimal processing conditions and making it suitable for industrial mass production.

Preparation method of intermediate for oxazolidinone derivative

The present invention relates to a novel method for preparing (S)&#x2014;N-(2-aminoethyl)-3-(4-alkoxyphenyl)propane-1,2-diamine trihydrochloride.

Method for preparation of (S)-N1-(2-aminoethyl)-3-(4-alkoxyphenyl)propane-1,2-diamine trihydrochloride

Provided are a novel polyketone polymerization catalyst and a method of preparing a ligand, which can reduce production costs and can enable commercial mass synthesis by using ((2,2-dimethyl-1,3-dioxane-5,5-diyl)bis(methylene))bis(bis(2-methoxyphenyl)phosphine) as a ligand constituting the polykeytone polymerization catalyst, the ligand having a simple structure and a small molecular weight while having high activity.

Polyketone polymerization catalyst

The present disclosure relates to a novel method for preparing high-purity gadobutrol. The present disclosure can be easily applied to a large scale production because purity of intermediate can be managed via simple and mild process and accordingly, high-purity or ultra high-purity gadobutrol that has higher purity than previous gadobutrol can be prepared in high yield therethrough.

Method for preparing gadobutrol

Disclosed is a novel method of preparing highly pure calcobutrol using an intermediate (butrol) of gadobutrol without using highly pure gadobutrol. This method is capable of obtaining calcobutrol at high purity and high yield through a simple and environmentally friendly process, and thus can be easily applied to mass production.

Method for preparing calcobutrol

The present invention provides a novel method for preparing lacosamide with high chiral purity from D-serine. The method of the present invention can obtain lacosamide with high chiral purity in a high yield through a simple and environmentally-friendly process and thus can be easily applied to mass production.

Method for preparing lacosamide

Gastroprotective flavone/flavanone compounds with therapeutic effect on

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Seoul, South Korea

Geun Jho Lim