Synthesis of Substituted Naphthalenes by 1,4-Palladium Migration Involved Annulation with Internal Alkynes
作者:Dong Wei、Tian-Jiao Hu、Chen-Guo Feng、Guo-Qiang Lin
DOI:10.1002/cjoc.201800169
日期:2018.8
The palladium catalyzed annulation of 1‐bromo‐2‐vinylbenzene derivatives with internal alkynes was realized for the efficient synthesis of substitutednaphthalenes. A controllable aryl to vinylic 1,4‐palladium migration process is the key for success.
is presented. In the presence of Pd(PPh3)4, accessible precursors undergo a Suzuki cross-coupling reaction with 2-(Boc-amino)benzeneboronic acid pinacol ester and then spontaneously undergo deprotection and intramolecular condensation to form the corresponding phenanthridines in one step. This reaction has a wide range of substrates with various functional groups, and the corresponding products have
ortho-Carbonylarylacetylenols have been employed for the synthesis of dihydronaphthofurans via AgTFA-catalyzed annulation reaction. A broad range of substrates both ortho-keto- and ortho-formylarylacetylenols could be employed in this transformation providing the desired products in good yields. However, the reaction pathways of these two substrates are different. The reaction of the ketone precursors could directly
Synthesis of 9-Substituted Fluorenols and Heteroring-fused Analogues by Intramolecular C–H Functionalization
作者:Yuji Kurimoto、Koichi Mitsudo、Seiji Suga
DOI:10.1246/cl.200807
日期:2021.2.5
A method for the selective synthesis of 9-substituted fluorenols (FOLs) was developed by suppressing intermolecular cyclization and promoting intramolecular C–H functionalization. This protocol was...
An efficient, one-pot synthesis of 4-methylisoquinolines via a cascade Pd-catalyzed Heck reaction, intramolecularcyclization and isomerization has been developed. This reaction has a wide range of substrates with various functional groups, and the corresponding products have been obtained in good yields.