摘要:
본 발명은 라말린의 합성방법에 관한 것으로, 더욱 상세하게는, 2-하이드라지닐-페놀(2-Hydrazinylphenol)과, 1번탄소의 카복실기 및 2번탄소의 아미노기가 보호된 L-글루탐산을 반응시키는 것을 특징으로 하는, 라말린의 합성방법 및 유지방법에 관한 것이다. 본 발명에 따르면, 항산화 및 항염증 효과가 뛰어난 라말린을 안정적인 수율로 합성할 수 있어, 라말린의 대량생산이 가능하다. 또한, 라말린을 장기간 안정적으로 유지할 수 있어 라말린을 산업상 이용하기 용이하다.
摘要:
This application relates to a process for selectively monoacylating hydrazines by reacting unsubstituted or monoalkylhydrazines with trichloromethyl aryl ketones.
摘要:
PURPOSE: N-retinoylpolyethyleneglycol hydrazide derivatives are provided to ensure excellent chemical stability, skin absorption, and solubility to water compared with existing retinoic acid derivatives and to secure aging prevention and skin regeneration effects. CONSTITUTION: N-retinoylpolyethyleneglycol hydrazide derivatives are represented by chemical formula 1. In chemical formula 1, R represents hydrogen or C1~6 lower alkyl, and n is an integer of 2-100. A method for preparing hydrazide derivatives of chemical formula 1 includes a step of reacting a compound in which X of chemical formula 2 is a hydroxy group with polyethylene glycol hydrazide derivatives of chemical formula 3 in the presence of a condensing agent and an organic amine catalyst.
摘要:
A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.