Highly Efficient Route to Fused Polycyclic Aromatics via Palladium-Catalyzed Aryne Annulation by Aryl Halides
作者:Zhijian Liu、Richard C. Larock
DOI:10.1021/jo0619534
日期:2007.1.1
Polycyclic aromatic and heteroaromatic hydrocarbons have been synthesized in high yield by two different processes involving the Pd-catalyzed annulation of arynes. The first process involves a Pd-catalyzed annulation of arynes by 2-halobiaryls and related vinylic halides. The second process utilizes a Pd-catalyzed double annulation of arynes by simple aryl halides. Both processes appear to involve
Palladium-Catalyzed Synthesis of Triphenylenes via Sequential C–H Activation and Decarboxylation
作者:Yuzhong Yang、Bang Zhou、Xiaoming Zhu、Guobo Deng、Yun Liang、Yuan Yang
DOI:10.1021/acs.orglett.8b02310
日期:2018.9.7
A novel tandem intermolecular decarboxylative coupling reaction of o-bromobenzoic acids and aryl iodides has been developed. The method affords a range of unsymmetrically triphenylenes and displays unique regioselectivity and broad substrate scope. Mechanistically, palladium/norbornene-catalyzed C–H activation and subsequent double decarboxylative coupling reactions were involved. Moreover, the triphenylenes
Annulative π-Extension of Unactivated Benzene Derivatives through Nondirected C–H Arylation
作者:Jae Bin Lee、Min Ho Jeon、Jeong Kon Seo、Gert von Helden、Jan-Uwe Rohde、Bum Suk Zhao、Jongcheol Seo、Sung You Hong
DOI:10.1021/acs.orglett.9b02583
日期:2019.9.6
to polycyclicarenes. Herein, we disclose a nondirected annulation approach of unactivated simple arenes. The palladium-catalyzed 2-fold C-H arylation event facilitates tandem C-C linkage relays to furnish fully benzenoid triphenylene frameworks using cyclic diaryliodonium salts. The inseparable regioisomeric mixture of 1- and 2-methyltriphenylenes is identified by the combined analysis of ion mobility-mass
Various possible routes to the synthesis of 2,2′-dihalogenobiphenyls have been investigated. The pyrolysis of biphenylene iodonium affords 2-chloro-2′-iodobiphenyl in useful yield. 2-Chloro-2′-lithiobiphenyl has been used in the synthesis of 4-trifluormethyl-; 3,4-dimethyl-; 3,5-dimethyl-; and 3,4-dimethoxytriphenylene.
Decarbonylative/decarboxylative [4 + 2] annulation of phthalic anhydrides and cyclic iodoniums towards triphenylenes
作者:Lingyu Huang、Rongrong Xie、Chaoying Wen、Yanyan Yang、Yiwen Wang、Shiyan Ren、Bin Huang、Shiqing Li
DOI:10.1039/d2ob00500j
日期:——
A palladium-catalyzed decarbonylative/decarboxylative annulation of phthalic anhydrides with cyclic diaryliodonium salts to synthesize triphenylenes has been developed.