A novel and efficient fast synthesis of 3-amino isocoumarins in good to excellent yields is reported. These interesting scaffolds can be obtained either in a single step from readily available ynamides or in a two-step sequence from the corresponding alkynyl bromide after C–N cross-coupling. This protocol, which only requires a Brønsted or Lewis acid as a promoter, offers an alternative approach toward
Preparation and reactivity of 5-substituted azepino[3,4-<i>b</i>]indoles
作者:C. Montagne、N. Laurent、B. Joseph、J.-Y. Mérour
DOI:10.1002/jhet.5570420728
日期:2005.11
Preparation of the 5-substituted azepino[3,4-b]indole core structure can be realised through a catalytic Heck reaction. The scope and limitations of this methodology are reported. The reactivity of di-tert-butyl 5-ethoxycarbonylmethylene-1,3,4,5-tetrahydro-1-oxoazepino[3,4-b]indole-2,10-dicarboxylate (1) was investigated in order to prepare the indole analogue of hymenialdisine and derivatives.
可以通过催化Heck反应实现5-取代的叠氮基[3,4- b ]吲哚核芯结构的制备。报告了这种方法的范围和局限性。为了制备吲哚,研究了5-乙氧基羰基亚甲基-1,3,4,5-四氢-1-氧杂氮杂环庚烷[3,4-b]吲哚-2,10-二羧酸二叔丁酯的反应性(1)。菊膜二碱及其衍生物的类似物。
Combinatorial library of 3-aryl-1h-indole-2-carboxylic acid
申请人:Cai Jianping
公开号:US20050089935A1
公开(公告)日:2005-04-28
Combinatorial libraries that contains various different 4, 5 fused 3-substituted-2-pyrrolocarboxylic acids for screening pharmacological activity and methods of synthesizing said libraries.
Combinatorial library of 3-aryl-1H-indole-2-carboxylic acid amides
申请人:Cai Jianping
公开号:US20050089936A1
公开(公告)日:2005-04-28
Combinatorial libraries that contain various different 4,5-fused-3-substituted-2-pyrrocarboxylic amides for screening pharmacological activity and methods of synthesizing said libraries.
Access to Indole- And Pyrrole-Fused Diketopiperazines via Tandem Ugi-4CR/Intramolecular Cyclization and Its Regioselective Ring-Opening by Intermolecular Transamidation
作者:Shashi Pandey、Shahnawaz Khan、Awantika Singh、Harsh M. Gauniyal、Brijesh Kumar、Prem M. S. Chauhan
DOI:10.1021/jo3018704
日期:2012.11.16
An efficient approach for the synthesis of indole- and pyrrole-fused diketopiperazines has been developed. This protocol involves the Ugi four-component reaction (U-4CR) followed by an intramolecular cyclization of the Ugi products at room temperature to afford the desired products in good to excellent yields. In addition, it is interesting to report the subsequent regioselective ring-opening of diketopiperazine unit occurring via an intermolecular transamidation reaction under mild condition, resulting in the formation of highly functionalized indole-2-carboxamides and pyrrole-2-carboxamides.