Chlorination and ortho-acetoxylation of 2-arylbenzoxazoles
作者:Yuting Leng、Fan Yang、Weiguo Zhu、Yangjie Wu、Xiang Li
DOI:10.1039/c1ob05223c
日期:——
Efficient and facile catalytic protocols for chlorination and ligand-directed ortho-acetoxylation of 2-arylbenzoxazoles have been developed. The chlorination is not a ligand-directed ortho-functionalization, but an electrophilic substitution process in the benzo ring of the benzoxazole moiety. Meanwhile, the acetoxylation exhibited high regioselectivity for the substrates containing a meta-substituent and occurred at the less sterically hindered ortho-C–H bond of the directing group.
Benzoxazol- oder Oxazolingruppenhaltige Polyarylsulfide
申请人:BAYER AG
公开号:EP0332997A2
公开(公告)日:1989-09-20
Die Erfindung betrifft neue Copolyarylensulfide, vorzugsweise Copolyphenylensulfide aus Dihalogenaromaten und Benzoxazol- oder Oxazolingruppen-haltigen Comonomeren.
本发明涉及新的共聚芳基硫醚,最好是二卤代芳烃和含有苯并恶唑或噁唑啉基团的共聚亚苯基硫醚。
Benzoxazolgruppen-haltige Polyarylenether und Verfahren zu ihrer Herstellung
申请人:BAYER AG
公开号:EP0345513A1
公开(公告)日:1989-12-13
Die Erfindung betrifft Benzoxazolgruppen-haltige Polyarylenether und Verfahren zu ihrer Herstellung.
本发明涉及含苯并恶唑基团的聚芳醚及其制备工艺。
US4960855A
申请人:——
公开号:US4960855A
公开(公告)日:1990-10-02
Cyclopalladated Ferrocenylimine Catalyzed Chlorination of 2-Arylbenzoxazoles
作者:Yuting Leng、Fan Yang、Yangjie Wu、Ke Li
DOI:10.1002/cjoc.201180245
日期:2011.8
An efficient and facile protocol for palladacycle‐catalyzedchlorination of 2‐arylbenzoxazoles was developed. The results represent the first examples involving the palladacycle as the catalyst for such chlorination. This chlorination was not a ligand‐directed ortho‐CH activation, but an electrophilic substitution process at the para‐position of the nitrogen atom in the benzo ring of benzoxazole moiety