By employing a readily available CuCl/DDQ catalyst system, we herein report a directC(sp3)–Hsulfonylation of xanthene derivates with odorless sodium sulfinates. Various 9H-xanthenes, thioxanthenes, and 9,10-dihydroacridines are efficiently transformed into the desired benzylic sulfonyl products via a radical/radical cross-coupling process, proceeding with the merits of broad substrate scope, operational
Electrochemically Mediated Direct C(
<i>sp</i>
<sup>3</sup>
)−H Sulfonylation of Xanthene Derivatives
作者:Wan‐Jie Wei、Yu‐Jing Zhong、Yu‐Feng Feng、Lei Gao、Hai‐Tao Tang、Ying‐Ming Pan、Xian‐Li Ma、Zu‐Yu Mo
DOI:10.1002/adsc.202101289
日期:2022.2.15
The construction of C(sp3)-sulfonyl bonds through directsulfonylation of C(sp3)−H bond presents a number of challenges, so an electrochemical oxidation-induced directsulfonylation of the xantheneC(sp3)−H bond was developed. Significant advantages of this method are high atom efficiency, functional group tolerance, transition metal- and oxidant-free conditions. The in vitro cytotoxicity of all product
cross-coupling reaction of xanthenes and sulfonyl hydrazides. Using easily accessible starting materials, this methodology proceeds efficiently with a high degree of functional group compatibility and with a wide scope of both xanthenes and sulfonyl hydrazides under operationally simple reaction conditions. Mechanistic investigations revealed that sulfonyl radicals could be generated from sulfonyl hydrazides
作者:G. W. H. Cheeseman、Kartar Singh、A. H. Wragg、T. S. Stevens、D. P. N. Satchell、Yanina Altman、David Ginsburg、R. C. Cambie、E. G. Brooker、B. Lythgoe、S. Trippett、T. Randall、L. A. K. Staveley、D. G. Harvey、J. A. Elvidge、P. H. Carter、J. Cymerman Craig、Ruth E. Lack、M. Moyle、R. P. A. Sneeden、S. P. Barton、B. Ellis、V. Petrow、F. H. Howell、D. A. H. Taylor