使用电子供体从相应的芳基卤化物生成芳基自由基,然后与芳烃进行分子内环化,可能是当代联芳基合成的重要进步。本文报道了一种绿色且实用的合成方案,用于获取各种六元和七元联芳基磺胺类化合物,尤其是具有游离 NH 基团的化合物,包括克级合成的演示。次硫酸根阴离子自由基 (SO 2 –• ),由试剂雕白粉或连二亚硫酸钠 (Na 2 S 2 O 4),被发现是从芳基卤化物形成芳基自由基的关键单电子转移剂,其在分子内芳基化后得到具有良好至优异产率的联芳基磺胺。该方法的特点是产生仍未开发的芳基自由基,使用廉价且易于获得的工业试剂,以及无过渡金属、温和和绿色的反应条件。
Synthesis and Structure-Activity Relationship Studies of HIV-1 Virion Infectivity Factor (Vif) Inhibitors that Block Viral Replication
作者:Akbar Ali、Jinhua Wang、Robin S. Nathans、Hong Cao、Natalia Sharova、Mario Stevenson、Tariq M. Rana
DOI:10.1002/cmdc.201200079
日期:2012.7
immunodeficiency virus 1 (HIV‐1) virioninfectivityfactor (Vif) protein, essential for in vivo viralreplication, protects the virus from innate antiviral cellular factor apolipoprotein B mRNA‐editing, enzyme‐catalytic, polypeptide‐like 3G (APOBEC3G; A3G) and is an attractive target for the development of novel antiviral therapeutics. We have evaluated the structure–activityrelationships of N‐(2‐methoxypheny
Benzonitrile Oxide Cycloadditions with Exocyclic Methylene Benzothiazepine Dioxides
作者:Sarah J. Ryan、Craig L. Francis、G. Paul Savage
DOI:10.1071/ch13444
日期:——
2]thiazepine 1,1-dioxides underwent 1,3-dipolar cycloaddition with benzonitrileoxide, generated in situ, to give isoxazoline spiro adducts. The cycloadditions were completely regioselective to give the hitherto unreported 3,4-dihydro-2H,4′H-spiro[benzo[f][1,2]thiazepine-5,5′-isoxazole] 1,1-dioxide cycloadduct. Where the N-substituent on the sulfonamide cycloaddition precursor was a 2-substituted arene, the
Six- or seven-membered dibenzosultams were synthesized upon treatment of N-aryl- or N-benzyl-2-halobenzenesulfonamides with HCOONa ⋅ 2H2O in DMSO without using additional measures and additives, such as light irradiation, electrochemical apparatus, transition metals, and oxidants. Further functionalization of the free NH group of the resultant dibenzosultams demonstrates the synthetic practicability
在 DMSO 中用 HCOONa·2H 2 O 处理N-芳基-或N-苄基-2-卤代苯磺酰胺后合成了六元或七元二苯磺胺,而无需使用额外的措施和添加剂,例如光照射、电化学装置、过渡金属、和氧化剂。所得二苯并磺胺的游离 NH 基团的进一步官能化证明了该方法的合成实用性。