Synthesis of benzosultams via an intramolecular sp<sup>2</sup>C–H bond amination reaction of o-arylbenzenesulfonamides under metal-free conditions
作者:Yuewen Li、Qiuping Ding、Guanyinsheng Qiu、Jie Wu
DOI:10.1039/c3ob41810c
日期:——
A practical synthetic method for the generation of benzosultams via an intramolecular sp2 C–H bond amination reaction of o-arylbenzenesulfonamides with PhI(OAc)2–I2 undermetal-freeconditions is developed. A broad range of substrates are tolerated under mild reaction conditions, affording bioactive benzosultams in good to excellent yields. The resulting benzothiazines could be conveniently transformed
Facial Syntheses of Bromobenzothiazines via Catalyst-Free Tandem C–H Amination/Bromination in Water
作者:Lixin Li、Yong Li、Zhengguang Zhao、Haotian Luo、Yan-Na Ma
DOI:10.1021/acs.orglett.9b02131
日期:2019.8.2
A transition-metal-free and environmentally friendly synthesis method for bromobenzothiazines through tandem C-H amination/bromination was reported. This reaction contains both intramolecular C-H amination and site-selective electrophilic bromination of arenes with NaBr as the bromo source, PhI(OAc)(2) or K2S2O8 as the oxidant, and H2O as the only solvent.
US5434261A
申请人:——
公开号:US5434261A
公开(公告)日:1995-07-18
[EN] BENZO-FUSED LACTAMS PROMOTE RELEASE OF GROWTH HORMONE<br/>[FR] LACTAMES BENZOFUSES PROMOTEURS DE LA SECRETION DE L'HORMONE DE CROISSANCE
申请人:MERCK & CO., INC.
公开号:WO1995003289A1
公开(公告)日:1995-02-02
(EN) There are disclosed certain novel compounds identified as benzo-fused lactams which promote the release of growth hormone in humans and animals. This property can be utilized to promote the growth of food animals to render the production of edible meat products more efficient, and in humans, to increase the stature of those afflicted with a lack of a normal secretion of natural growth hormone. Growth promoting compositions containing such benzo-fused lactams as the active ingredient thereof are also disclosed.(FR) L'invention porte sur certains composés nouveaux dits lactames benzofusés promoteurs de la sécrétion de l'hormone de croissance chez l'homme et chez l'animal. Cette propriété peut servir à favoriser la croissance d'animaux de boucherie et accroître la production de produits carnés alimentaires ou, chez l'homme, à augmenter la taille de sujets présentant une déficience de sécrétion de l'hormone naturelle de croissance. L'invention porte également sur des compositions dont lesdits lactames benzofusés constituent l'agent actif.
Syntheses of Bromo-<i>N</i>-heterocycles through Dibromohydantoin-Promoted Tandem C–H Amination/Bromination
Herein, we report a metal-free radical tandem C–H amination and bromination reaction with dibromohydantoin (DBH) as both the amination and brominationreagents and water as the main solvent. The reaction involves in intramolecular C–H amination and electrophilicbromination using cheap commercially available DBH. The products represent heterocyclic building blocks, readily modifiable by classical cross-coupling