Ring-Opening/Recyclization Cascades of Monoactivated Cyclopropanes
作者:Uttam K. Mishra、Kaushalendra Patel、S. S. V. Ramasastry
DOI:10.1021/acs.orglett.0c01056
日期:2020.5.15
A variety of cyclopropyl aryl ketones undergo uncatalyzed cascade ring-opening/recyclization reactions to generate indenones and fluorenones. In addition, a new strategy to access 3-hydroxyindanones possessing two contiguous stereogenic centers, one of them being an all-carbonquaternarycenter, was also established. During the course of the investigation, pronounced solvent, temperature, and substituent
Synthesis of Cyclopropanoids via Substrate-Based Cyclization Pathways
作者:Uttam K. Mishra、Kaushalendra Patel、S. S. V. Ramasastry
DOI:10.1021/acs.orglett.8b03537
日期:2019.1.4
unexpected reactions triggered by the dimethyloxosulfonium methylide led to the discovery of unconventional approaches for the synthesis of cyclopropa-fused tetralones and indeno-spirocyclopropanes. These highly functionalized structures were further elaborated in one step to privileged scaffolds such as tetralones, indenones, and fluorenones. As a whole, the results presented herein establish new diversity-oriented
Synthesis of 2,3-diarylfluorenones by domino ‘twofold Heck/electrocyclization/dehydrogenation’ reactions of 2,3-dibromoindenone
作者:Omer A. Akrawi、Afsar Khan、Munawar Hussain、Hamid H. Mohammed、Alexander Villinger、Peter Langer
DOI:10.1016/j.tetlet.2013.03.011
日期:2013.6
Domino double Heck/electrocyclization/dehydrogenation reactions of 2,3-dibromo-1H-inden-1-one with styrenes provide a convenient synthesis of 2,3-diarylfluorenones.