KR970006272A

KR970006272A - New manufacturing method of UV absorber

Info

Publication number: KR970006272A
Application number: KR1019950020626A
Authority: KR
Inventors: 김찬우; 채헌승; 김기석
Original assignee: 이웅열; 주식회사 코오롱
Priority date: 1995-07-13
Filing date: 1995-07-13
Publication date: 1997-02-19

Abstract

본 발명은 일반식 (Ⅱ)의 디아릴케톤과 일반식 (Ⅲ)의 시아노아세트란 에스테르를 반응시켜서 구조식(Ⅰ)의 치환된 페닐신남산 에스테르를 제조함에 있어서, 별도의 유기용매의 사용없이, 소듐 메톡사이드, 소듐 에톡사이드 및 소듐 히드라이드에서 선택된 유기금속촉매의 존재하에 120~170℃의 온도에서 불활성개스를 버블링시키면서 축하반응을 행하여 묵적화합물을 제조하는 방법을 제공하는 것이며, 본 발명의 방법으로 고순도, 고수율 및 저렴하게 목적화합물을 제조할 수 있다.The present invention reacts the diaryl ketone of the general formula (II) with the cyanoacelan ester of the general formula (III) to prepare the substituted phenyl cinnamic acid ester of the structural formula (I), without using an additional organic solvent. In the presence of an organometallic catalyst selected from sodium methoxide, sodium ethoxide and sodium hydride, it is to provide a method for producing a silent compound by the banung reaction while bubbling an inert gas at a temperature of 120 ~ 170 ℃, the present invention By the method of high purity, high yield and inexpensive the target compound can be prepared.

상기 식에서 Ar은 벤젠, 탄소수 1~3의 저금알킬로 1 내지 3위치가 치환된 벤젠, 1~3의 할로겐으로 치환된 벤젠 또는 탄소수 1~4의 저급알콕시기로 1 내지 3의 위치가 치환된 벤젠을 의미하며, R은 탄소수 1~17의 직쇄 또는 분지쇄의 알킬기이다.Wherein Ar is benzene, benzene substituted at 1 to 3 positions with lower alkyl having 1 to 3 carbon atoms, benzene substituted at 1 to 3 halogen, or benzene substituted at 1 to 3 positions with lower alkoxy group having 1 to 4 carbon atoms R is a linear or branched alkyl group having 1 to 17 carbon atoms.

Description

New manufacturing method of UV absorber

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims

In the preparation of substituted cinnamic acid ester of formula (I) by reacting the diaryl ketone of formula (II) with the cyanoacelan ester of formula (III), the presence of an organometallic catalyst without the use of an organic solvent A condensation reaction is carried out while bubbling an inert dog at a temperature of 120 to 170 ° C. to prepare a substituted cinnamic acid ester of the structural formula (I).

Wherein Ar is benzene, benzene substituted at 1 to 3 positions with lower alkyl having 1 to 3 carbon atoms, benzene substituted at 1 to 3 halogen, or benzene substituted at 1 to 3 positions with lower alkoxy group having 1 to 4 carbon atoms R means a linear or branched alkyl group having 1 to 17 carbon atoms.

The method of using an organometallic catalyst selected from sodium methoxide, sodium ethoxide, sodium hydride as the organometallic catalyst in claim 1.

※ Note: The disclosure is based on the initial application.