IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0419994
(1989-10-11)
|
우선권정보 |
DE-3836780 (1988-10-28) |
발명자
/ 주소 |
- Klinkmann Kurt (Nettersheim DEX) Herzhoff Michael (Much DEX) Burmeister Gerhard (Leverkusen DEX)
|
출원인 / 주소 |
- Bayer Aktiengesellschaft (Leverkusen DEX 03)
|
인용정보 |
피인용 횟수 :
15 인용 특허 :
2 |
초록
▼
Optionally substituted benzyl-benzenes can be prepared by reaction of a benzyl alcohol of the formula [Figure] with a benzene of the formula [Figure] in which R1, R2, R3, R4 and R5 independently of one another denote hydrogen, C1-C4-alkyl, C1-C4-alkoxy, fluorine or chlorine, where R1, R2, R3 and R4
Optionally substituted benzyl-benzenes can be prepared by reaction of a benzyl alcohol of the formula [Figure] with a benzene of the formula [Figure] in which R1, R2, R3, R4 and R5 independently of one another denote hydrogen, C1-C4-alkyl, C1-C4-alkoxy, fluorine or chlorine, where R1, R2, R3 and R4 independently of one another may also represent hydroxyl and R5 may additionally be C5-C8-alkyl, R6 represents hydrogen or one of the groups [Figure] R8 denotes hydrogen or hydroxymethyl, in a ratio of 1 mole of benzene to 0.8-5 moles of benzyl alcohol in the presence of an amount of activated bleaching earth of 0.05-5% by weight, relative to the amount of benzyl alcohol, at a temperature between 90°C. and 140°C. in the presence of a diluent.
대표청구항
▼
A process for the preparation of benzyl-benzenes of the formula [Figure] in which R1, R2, R3, R4 and R5 independently of one another denote hydrogen, C1-C4-alkyl, C1-C4-alkoxy, fluorine or chlorine, where R1, R2, R3 and R4 independently of one another may also represent hydroxyl and R5 may additiona
A process for the preparation of benzyl-benzenes of the formula [Figure] in which R1, R2, R3, R4 and R5 independently of one another denote hydrogen, C1-C4-alkyl, C1-C4-alkoxy, fluorine or chlorine, where R1, R2, R3 and R4 independently of one another may also represent hydroxyl and R5 may additionally be C5-C8-alkyl, R6 represents hydrogen or one of the groups [Figure] R7 represents hydrogen or the group [Figure] n represents the number 1 or 2 and may also represent the number 3 in the case in which one of the radicals R3, R4, R5 or R6 denotes hydrogen, wherein a benzene of the formula [Figure] is reacted with a benzyl alcohol of the formula [Figure] where R1 to R5 have the abovementioned meaning, R6 represents hydrogen or one of the groups [Figure] and R8 denotes hydrogen or hydroxymethyl, in a ratio of 1 mole of benzene to 0.5-5 moles of benzyl alcohol in the presence of an amount of activated bleaching earth of 0.05-5% by weight, relative to the amount of benzyl alcohol, at a temperature between 90°C. and 140°C. in the presence of a diluent.
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