Improved Method for the Iodine(III)-Mediated Preparation of Aryl Sulfonimidates
摘要:
One-pot hypervalent iodine-mediated oxidations of arylsulfinamides to arylsulfonimidates is reported. Contrary to the case of alkylsulfinamides, use of iodosobenzene was not satisfactory. The reaction worked best with diacetoxyiodosobenzene (DIB) and a mild base (MgO). The influence of substituents on the iodine(III) reagent arene has been examined.
尽管最近在金属催化的(杂)芳基(拟)卤化物与 NH 底物的 C-N 交叉偶联方面取得了进展,但涉及亚磺酰胺亲核试剂的此类转化尚不成熟。在此,我们报告了这种类型的 Ni 催化的 C-N 交叉偶联,主要使用叔丁亚磺酰胺(即埃尔曼亚磺酰胺)作为测试亲核试剂。当使用 ( L )Ni( o -tol)Cl(L = CyPAd-DalPhos 或 PhPAd-DalPhos)预催化剂时,廉价且丰富的(杂)芳基氯被证明是此类反应中合适的反应伙伴。我们还介绍了一项实验和计算研究的结果,重点是 C-N 还原消除,涉及新制备和分离的亚磺酰胺 ( L )Ni(o -tol)(NHS(O) t Bu) 配合物,其中去质子化导致形成假定的阴离子氮宾物种 [( L )Ni( o -tol)(NS(O) t Bu)] -代表 C–N 还原消除的首选途径,这与我们过去对相关磺酰胺配合物的研究一致。
Improved Method for the Iodine(III)-Mediated Preparation of Aryl Sulfonimidates
作者:Anne Felim、Aurélie Toussaint、Courtney R. Phillips、Dominique Leca、Anna Vagstad、Louis Fensterbank、Emmanuel Lacôte、Max Malacria
DOI:10.1021/ol052790t
日期:2006.1.1
One-pot hypervalent iodine-mediated oxidations of arylsulfinamides to arylsulfonimidates is reported. Contrary to the case of alkylsulfinamides, use of iodosobenzene was not satisfactory. The reaction worked best with diacetoxyiodosobenzene (DIB) and a mild base (MgO). The influence of substituents on the iodine(III) reagent arene has been examined.
Nickel-Catalyzed N-Arylation of Sulfinamides: A Comparative Study versus Analogous Sulfonamide Cross-Couplings
作者:Connor M. Simon、Katherine N. Robertson、Patrick L. DeRoy、Arun A. Yadav、Erin R. Johnson、Mark Stradiotto
DOI:10.1021/acs.organomet.2c00545
日期:——
computational study focusing on C–N reductiveelimination involving newly prepared and isolated sulfinamido (L)Ni(o-tol)(NHS(O)tBu) complexes, in which deprotonation leading to the formation of the putative anionic nitrene species [(L)Ni(o-tol)(NS(O)tBu)]− represents the preferred pathway for C–N reductiveelimination, in keeping with our past study of related sulfonamido complexes.
尽管最近在金属催化的(杂)芳基(拟)卤化物与 NH 底物的 C-N 交叉偶联方面取得了进展,但涉及亚磺酰胺亲核试剂的此类转化尚不成熟。在此,我们报告了这种类型的 Ni 催化的 C-N 交叉偶联,主要使用叔丁亚磺酰胺(即埃尔曼亚磺酰胺)作为测试亲核试剂。当使用 ( L )Ni( o -tol)Cl(L = CyPAd-DalPhos 或 PhPAd-DalPhos)预催化剂时,廉价且丰富的(杂)芳基氯被证明是此类反应中合适的反应伙伴。我们还介绍了一项实验和计算研究的结果,重点是 C-N 还原消除,涉及新制备和分离的亚磺酰胺 ( L )Ni(o -tol)(NHS(O) t Bu) 配合物,其中去质子化导致形成假定的阴离子氮宾物种 [( L )Ni( o -tol)(NS(O) t Bu)] -代表 C–N 还原消除的首选途径,这与我们过去对相关磺酰胺配合物的研究一致。