3D Heterocycles from Sulfonimidamides by Sequential C−H Bond Alkenylation/Aza‐Michael Cyclization
作者:Anne‐Katrin Bachon、Alina Hermann、Carsten Bolm
DOI:10.1002/chem.201900920
日期:2019.4.23
rhodium‐catalyzed C−H bond alkenylation followed by aza‐Michael cyclization leads to unprecedented benzoisothiazole 1‐oxides. The applicability and robustness of the method is demonstrated in 25 examples with yields up to 95 %. The resulting scaffolds are partly saturated, 3D heterocycles with potential significance for medicinal and agricultural chemistry.
An NH transaction: The first direct synthesis of tertiary NH sulfonimidamides from tertiary sulfinamides by electrophilic NH transfer has been achieved. In vitro studies did not reveal any intrinsic flaw of the sulfonimidamide group regarding properties relevant to medicinal chemistry.
Matching Carbenes and Sulfoximines
<i>via</i>
Ketenes Generated from
<i>α</i>
‐Diazoketones by Blue Light
作者:Shulei Pan、Marco T. Passia、Xianliang Wang、Peng Wu、Ding Ma、Carsten Bolm
DOI:10.1002/adsc.202201274
日期:2023.1.10
Although NH-sulfoximines are known to react with carbenes by deamidation pathways, they can be combined if the latter are generated as transients from diazo compounds under blue light irradiation to undergo rapid Wolff rearrangement to generate reactive ketenes. Subsequent addition of sulfoximines or sulfonimidamides lead to N-acylated products in good to excellent yields. Beneficial are the mild reaction