与最近在氮酰化催化方法学发展中取得的重大进展相反,N-酰基亚磺酰亚胺的合成进展缓慢,并且仍然主要依赖于化学计量的活化剂的使用。在这里,我们描述了由具有B 3 NO 2环系统的杂环催化剂促进的磺酰亚胺中的氮原子与羧酸的直接酰化作用。使用被发现协议是操作简单并且能够耐受宽范围的官能团,家具的Ñ酰化的亚砜亚胺,收率良好。该多硼催化剂驯服了以前难以处理的氮亲核试剂,通过在同一反应罐中催化两个连续的氮酰化反应,可以短暂合成因子Xa抑制剂。
Enantiodivergent Desymmetrization in the Rhodium(III)‐Catalyzed Annulation of Sulfoximines with Diazo Compounds
作者:Bingxue Shen、Boshun Wan、Xingwei Li
DOI:10.1002/anie.201810472
日期:2018.11.19
reactions of arenes have relied on the employment of chiral RhIII/IrIII cyclopentadienyl catalysts, the introduction of chiral carboxylic acids to achiral Cp*RhX2 catalysts, and the integration of both strategies. Despite considerable progress, each reaction only provided a specific configuration of the enantioenriched product when using a particular chiral catalyst. Reported in this work is the enantiodivergent
Rh III和Ir III催化的芳烃不对称CH功能化反应依赖于使用手性Rh III / Ir III环戊二烯基催化剂,将手性羧酸引入非手性Cp * RhX 2催化剂,以及两者的结合策略。尽管取得了相当大的进步,但是当使用特定的手性催化剂时,每个反应仅提供了对映体富集产物的特定构型。这项工作报道了Rh III对亚砜亚砜与各种重氮化合物的对映异构偶联催化的非对称环形。通过明智地选择非手性羧酸可以使对映体发散,并且对映体选择性与羧酸和磺胺基亚胺的空间偏倚相关。
Ligand-to-Copper Charge-Transfer-Enabled C–H Sulfoximination of Arenes
photoinduced sulfoximine-to-copper charge-transfer-enabled generation of sulfoximinyl radicals directly from NH-sulfoximines for C–H sulfoximination of arenes via radical addition. Through copper-LMCT, N-arylation of NH-sulfoximines was achieved for the first time using arenes of different electronic structures as the aryl donors.
Organoboron/Palladium Cocatalytic Allylation of <i>N</i>H-Sulfoximines Using Allylic Alcohols
作者:Matthew T. Zambri、Celine Ho、Mark S. Taylor
DOI:10.1021/acs.orglett.3c03323
日期:2023.11.24
Synergistic organoboron/palladium cocatalysis enables dehydrative couplings of NH-sulfoximines with allylic alcohols, furnishing the corresponding N-allylated products. The reactions proceed in the absence of a Brønsted base and are tolerant of diverse sulfoximine partners, including functionalized variants. Experimental and computational studies suggest that the sulfoximine reagent is activated by