Metal Free Benzylation and Alkylation of Quinoxalin‐2(1
<i>H</i>
)‐ones with Alkenes Triggered by Sulfonyl Radical Generated from Sulfinic Acids
作者:Himangsu Sekhar Dutta、Ashfaq Ahmad、Afsar Ali Khan、Mohit Kumar、Raziullah、Dipankar Koley
DOI:10.1002/adsc.201901212
日期:2019.12.17
A metal‐free domino multicomponent reaction for the direct C−H benzylation and alkylation of quinoxalin‐2(1H)‐ones using alkenes is described. Triggered by the sulfonyl radical generated from sulfinic acid, the alkenes are transformed to alkyl radicals that react exclusively at the C‐3 position of quinoxalin‐2(1H)‐ones. Importantly, the method not only functionalizes medicinally important quinoxalin‐2(1H)‐one
Sodium iodide-mediated synthesis of vinyl sulfides and vinyl sulfones with solvent-controlled chemical selectivity
作者:Congrong Liu、Jin Xu、Gongde Wu
DOI:10.1039/d1ra07086j
日期:——
Vinyl sulfides and vinyl sulfones are ubiquitous structures in organic chemistry because of their presence in natural and biologically active compounds and are very frequently encountered structural motifs in organic synthesis. Herein we report an efficient synthesis of vinyl sulfides and vinyl sulfones via transition metal-free sodium iodide-mediated sulfenylation of alcohols and sulfinic acids with
A novel and efficient method for the selective synthesis of sulfinylated benzofulvenes has been developed through the BF3·Et2O-promoted electrophilic addition/cyclization of 1,3-enynes. This metal-free cascade reaction employs readily accessible arylsulfinic acids as sulfinyl cation sources at room temperature and provides a wide range of functionalized benzofulvenes in good to excellent yields under
通过BF 3 ·Et 2 O 促进的1,3-烯炔的亲电加成/环化,开发了一种选择性合成亚磺酰化苯并富烯的新型高效方法。这种无金属级联反应在室温下使用容易获得的芳基亚磺酸作为亚磺酰基阳离子源,并在温和条件下以良好到优异的产率提供广泛的官能化苯并富烯。
Metal- and oxidant-free S–P(O) bond construction via direct coupling of P(O)H with sulfinic acids
作者:Youngtaek Moon、Yonghoon Moon、Hangyeol Choi、Sungwoo Hong
DOI:10.1039/c6gc03285k
日期:——
A method for S–P(O) bond formation between R2P(O)H and sulfinic acids was developed under metal-, oxidant-, and halogen-free conditions.