4-Chloro-o-xylene → 2,2'-Dichloro-4,4',5,5'-tetramethylbenzophenone

HRID 341894

반응식

HRID 341894 반응식
[CH:1]1[C:6]([C:7](C2C=CC3C(OC(=O)C=3C=2)=O)=[O:8])=[CH:5][C:4]2[C:20](O[C:23](=O)[C:3]=2[CH:2]=1)=O.[Cl:25][C:26]1[CH:27]=[C:28]([CH3:33])[C:29]([CH3:32])=[CH:30][CH:31]=1.C(Cl)(=O)C([Cl:37])=O>>[Cl:25][C:26]1[CH:27]=[C:28]([CH3:33])[C:29]([CH3:32])=[CH:30][C:31]=1[C:7]([C:6]1[CH:5]=[C:4]([CH3:20])[C:3]([CH3:23])=[CH:2][C:1]=1[Cl:37])=[O:8]

참가 물질

4

반응물 3

HCID 328864-Chloro-o-xyleneHCID 65578Oxalyl chlorideHCID 754984,4'-Carbonyldiphthalic anhydride

생성물 1

HCID 150271722,2'-Dichloro-4,4',5,5'-tetramethylbenzophenone

실험 절차

Specific benzophenonetetracarboxylic dianhydrides preferred in this invention are readily available from commercial sources or synthesis. For instance, 3,3',4,4'-benzophenonetetracarboxylic dianhydride (D1) is available from Aldrich Chemical Co., Inc. (1001 W. St. Paul Ave., Milwaukee, Wis. 53233). 2,2'-Dichloro-4,4',5,5'-benzophenone tetracarboxylic dianhydride (D2) is available from 4-chloro-o-xylene by Friedel-Crafts acylation with oxalyl chloride to give 2,2'dichloro-4,4',5,5',-tetramehtylbenzophenone, followed by oxidation with nitric acid and dehydration of the resulting tetracarboxylic acid as described by Falcigno, et al., J. Poly. Sci. 1992, 30, 1433.

후처리

  1. customare readily available from commercial sources or synthesis

출처 및 근거

ORD 기록
ord-6fbd979732f74fb1941246ded6b35f34
출처 데이터셋
uspto-grants-1999_01
특허 번호
US05856431

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