氨磺酰氯的单电子还原比磺酰氯更具挑战性。然而,氨磺酰氯和磺酰氯可以很容易地通过甲硅烷基的 Cl 原子提取以相似的速率被激活。因此,选择这种后期的活化模式来获得脂肪族磺酰胺,使用廉价的烯烃、三(三甲基甲硅烷基)硅烷和光催化剂曙红 Y 进行单步氢氨磺酰化。这种后期功能化方案生成的分子与含磺酰胺的环丁基-直接用于药物化学的螺环吲哚。
The invention relates to the field of polymers and olefin polymerization, and more specifically olefin metathesis polymerization. The invention provides regioregular alternating polymers and methods of synthesizing such polymers.
Hydrosulfonylation of Alkenes with Sulfonyl Chlorides under Visible Light Activation
作者:Sandrine M. Hell、Claudio F. Meyer、Antonio Misale、Jeroen B. I. Sap、Kirsten E. Christensen、Michael C. Willis、Andrés A. Trabanco、Véronique Gouverneur
DOI:10.1002/anie.202004070
日期:2020.7.6
Sulfonyl chlorides are inexpensive reactants extensively explored for functionalization, but never considered for radical hydrosulfonylation of alkenes. Herein, we report that tris(trimethylsilyl)silane is an ideal hydrogen atom donor enabling highly effective photoredox‐catalyzed hydrosulfonylation of electron‐deficient alkenes with sulfonyl chlorides. To increase the generality of this transformation
The invention relates to the field of polymers and olefin polymerization, and more specifically olefin metathesis polymerization. The invention provides regioregular alternating polymers and methods of synthesizing such polymers.
Synthesis of Copolymers by Alternating ROMP (AROMP)
作者:Airong Song、Kathlyn A. Parker、Nicole S. Sampson
DOI:10.1021/ja809661k
日期:2009.3.18
The alternating polymerization of cyclobutene 1-carboxylic esters and cyclohexene derivatives with the precatalyst [(H2IMes)(3-Br-pyr)(2)Cl2Ru=CHPh] is described. This reaction is synthetically accessible and provides (AB)(n) heteropolymers with an alternating backbone and alternating functionality. The regiocontrol of heteropolymer formation derives from the inability of the cyclobutene ester and cyclohexene monomers to undergo homopolymerization in combination with the favorable kinetics of cross polymerization.