Pd-Catalyzed Intramolecular Acylation of Aryl Bromides via C−H Functionalization: A Highly Efficient Synthesis of Benzocyclobutenones
摘要:
A new catalyst system for the intramolecular acylation of aldehydes with aryl bromides via C-H functionalization is described. The transformation is distinguished by a remarkable functional group tolerance and hence allows for the synthesis of a wide variety of highly functionalized benzocyclobutenones with a diverse set of substitution patterns from simple and easily accessible precursors.
The stereochemical course of intramolecularcarbolithiation of alkynes was, experimentally and computationally, investigated for the stereocontrolled preparation of alkylidene indenols. Reversal of syn-carbolithiation to anti-carbolithiation is observed in the presence of a lithium-chelating propargylic substituent. Electrophile trapping and domino process give access to tetrasubstituted compounds
Benzocycloheptene derivatives, process for their production and their use as anti-inflammatory agents
申请人:Rehwinkel Hartmut
公开号:US20060247292A1
公开(公告)日:2006-11-02
The invention relates to polysubstituted 5H-benzocycloheptene derivatives of formula (I)
process for their production, and their use as anti-inflammatory agents.
Palladium-Catalyzed Access to Benzocyclobutenone-Derived Ketonitrones via C(sp<sup>2</sup>)–H Functionalization
作者:Jakub Brześkiewicz、Rafał Loska
DOI:10.1021/acs.orglett.2c01317
日期:2022.6.10
The palladium-catalyzedC(sp2)–H functionalization of bromoaryl aldonitrones leading to benzocyclobutenone-derived ketonitrones is described. This method allows for the preparation of a wide range of strained, four-membered ketonitrones with broad functional group tolerance. Downstream transformations of the formed products were readily demonstrated, illustrating the synthetic utility of the obtained