KR950017901A - Method for preparing 2-hydroxy-4-methoxy benzophenone - Google Patents

Method for preparing 2-hydroxy-4-methoxy benzophenone Download PDF

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Publication number
KR950017901A
KR950017901A KR1019930026376A KR930026376A KR950017901A KR 950017901 A KR950017901 A KR 950017901A KR 1019930026376 A KR1019930026376 A KR 1019930026376A KR 930026376 A KR930026376 A KR 930026376A KR 950017901 A KR950017901 A KR 950017901A
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KR
South Korea
Prior art keywords
hydroxy
benzophenone
methoxy benzophenone
reaction
preparing
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KR1019930026376A
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Korean (ko)
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KR960008660B1 (en
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이상구
이건
Original Assignee
하기주
주식회사 코오롱
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Priority to KR93026376A priority Critical patent/KR960008660B1/en
Publication of KR950017901A publication Critical patent/KR950017901A/en
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Publication of KR960008660B1 publication Critical patent/KR960008660B1/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/76—Ketones containing a keto group bound to a six-membered aromatic ring
    • C07C49/782—Ketones containing a keto group bound to a six-membered aromatic ring polycyclic
    • C07C49/784—Ketones containing a keto group bound to a six-membered aromatic ring polycyclic with all keto groups bound to a non-condensed ring
    • C07C49/786—Benzophenone

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

본 발명은 하기의 일반식(I)으로 표시되어지는 2-히드록시-4-메톡시 벤조페논을 경제적으로 제조하기 위한 방법에 관한 것이다.The present invention relates to a method for economically preparing 2-hydroxy-4-methoxy benzophenone represented by the following general formula (I).

본 발명은, 2. 4-디히드록시 벤조페논을 알킬화하여 2-히드록시-4-메톡시 벤조페논을 제조함에 있어서, 하기의 반응식(III)과 같이 저급 알칸류와 저급 케톤류의 복합 용매 중에서 2, 4-디히드록시 벤조페논과 디메틸 설파이트를 알칼리 금속 탄산염의 촉매하에 반응시킴을 특징으로 하는 2-히드록시-4-메톡시 벤조페논의 제조방법을 제공한다.The present invention, in the preparation of 2-hydroxy-4-methoxy benzophenone by alkylation of 2-dihydroxy benzophenone, in a mixed solvent of lower alkanes and lower ketones as shown in Scheme (III) below 2, 4-dihydroxy benzophenone and dimethyl sulfite are reacted under the catalyst of an alkali metal carbonate to provide a method for producing 2-hydroxy-4-methoxy benzophenone.

이로써, 4-위치의 히드록시기를 선택적으로 알킬화시켜 수율을 향상시킬 수 있으며, 보다 저렴한 출발물질을 사용하여 경제적으로 보다 유리하며, 또한 반응계로부터 반응 부산물을 쉽게 제거할 수 있어 반응 용매로 재활용할 수 있어 폐액 처리의 부담이 경감되는 등의 경제적, 환경학적 장점을 기대할 수 있다.This can improve the yield by selectively alkylating the 4-positioned hydroxy group, it is more economically more advantageous using cheaper starting materials, and can easily remove the reaction by-products from the reaction system can be recycled into the reaction solvent Economical and environmental benefits, such as less burden on waste disposal, can be expected.

Description

2-히드록시-4-메톡시 벤조페논의 제조방법Method for preparing 2-hydroxy-4-methoxy benzophenone

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

Claims (7)

2,4-디히드록시 벤조페논을 알킬화하여 2-히드록시-4-메톡시 벤조페논을 제조함에 있어서, 하기의 반응식(III)과 같이 저급 알칸류와 저급 케톤류의 복합 용매 중에서 2,4-디히드록시 벤조페논과 디메틸 설파이트를 알칼리 금속 탄산염의 촉매하에 반응시킴을 특징으로 하는 2-히드록시-4-메톡시 벤조페논의 제조방법.In preparing 2-hydroxy-4-methoxy benzophenone by alkylating 2,4-dihydroxy benzophenone, 2,4- in a mixed solvent of lower alkanes and lower ketones as shown in Scheme (III) below. A process for producing 2-hydroxy-4-methoxy benzophenone characterized by reacting dihydroxy benzophenone and dimethyl sulfite under a catalyst of an alkali metal carbonate. 제1항에 있어서, 상기한 저급 알칸류와 저급 케톤류의 복합 용매는 저급 알칸과 저급 케톤이 1 : 1∼1 : 4의 중량비로 구성되어짐을 특징으로 하는 방법.The method of claim 1, wherein the lower alkanes and lower ketones are composed of lower alkanes and lower ketones in a weight ratio of 1: 1 to 1: 4. 제1항 또는 제2항에 있어서, 상기한 저급 알칸류는 시클로핵산 또는 n-핵산인 것을 특징으로 하는 방법.The method of claim 1 or 2, wherein the lower alkanes are cyclonucleic acid or n-nucleic acid. 제1항 또는 제2항에 있어서, 상기한 저급 케톤류는 아세톤, 메틸에틸케톤 또는 시클록핵산온인 것을 특징으로 하는 방법.The method according to claim 1 or 2, wherein the lower ketones are acetone, methyl ethyl ketone or cyclohexanone. 제1항에 있어서, 상기한 알칼리 금속 탄산염의 촉매는 탄산칼륨 또는 탄산 나트륨인 것을 특징으로 하는 방법.The method of claim 1, wherein the alkali metal carbonate catalyst is potassium carbonate or sodium carbonate. 제1항에 있어서, 상기한 반응은 60∼70℃의 온도에서 5∼10시간 동안 행하여짐을 특징으로 하는 방법.The method of claim 1 wherein said reaction is carried out at a temperature of 60 to 70 ° C. for 5 to 10 hours. 제1항에 있어서, 반응액중에 Na2SO3을 더욱 첨가함을 특징으로 하는 방법.The method according to claim 1, wherein Na 2 SO 3 is further added to the reaction solution. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR93026376A 1993-12-03 1993-12-03 Preparation of 2-hydroxy-4-methoxy benzo phenone KR960008660B1 (en)

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KR93026376A KR960008660B1 (en) 1993-12-03 1993-12-03 Preparation of 2-hydroxy-4-methoxy benzo phenone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR93026376A KR960008660B1 (en) 1993-12-03 1993-12-03 Preparation of 2-hydroxy-4-methoxy benzo phenone

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KR950017901A true KR950017901A (en) 1995-07-20
KR960008660B1 KR960008660B1 (en) 1996-06-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020044889A (en) * 2000-12-07 2002-06-19 김충섭 Preparation of 2-hydroxy-4-octyloxybenzophenone with a high degree of Selectivity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020044889A (en) * 2000-12-07 2002-06-19 김충섭 Preparation of 2-hydroxy-4-octyloxybenzophenone with a high degree of Selectivity

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KR960008660B1 (en) 1996-06-28

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