[3 + 3] Cycloaddition of in Situ Formed Azaoxyallyl Cations with 2-Alkenylindoles: An Approach to Tetrahydro-β-carbolinones
摘要:
A novel [3 + 3] cycloaddition between in situ formed azaoxyallyl cations and 2-alkenylindoles has been developed. This concise method allows the efficient construction of a series of tetrahydro-beta-carbolinones in good yields under mild conditions. Gram-scale experiments and further derivatization of tetrahydro-beta-carbolinones highlighted the potential utility of our method.
NOVEL METHODS FOR PREPARATION OF SUBSTITUTED PYRIDINES AND RELATED NOVEL COMPOUNDS
申请人:Watkins Edmond Blake
公开号:US20200095245A1
公开(公告)日:2020-03-26
The present invention relates to novel methods of preparation of substituted pyridines and the compounds produced therefrom. In particular, the present invention provides efficient methods for the construction of diversely substituted pyridines, with varying substitution patterns under simple and metal-free conditions with high atom- and pot-economy and excellent functional group tolerance, and which are useful for the synthesis of natural products.
[EN] HETEROCYCLIC COMPOUNDS, METHODS OF MAKING THEM AND THEIR USE IN THERAPY<br/>[FR] COMPOSES HETEROCYCLIQUES, PROCEDES DE PRODUCTION DE CEUX-CI ET UTILISATION DE CEUX-CI DANS UN TRAITEMENT
申请人:AFFINIUM PHARM INC
公开号:WO2004052890A1
公开(公告)日:2004-06-24
In part, the present invention is directed to antibacterial compounds of formula (I) wherein A is a bicyclic heteroaryl ring or a tricyclic ring and R2 is an heterocyclic residue; L is a bond, or L is alkyl, alkenyl or cycloalkyl.
A Brønsted acid-promoted cyclodimerization of C(3)-, C(2)-, or N(1)-substituted indole ketone derivatives is described. A wide range of structurally diverse bisindole fused-9-oxabicyclo[3.3.1]nonane and bisindole fused-cyclooctatetraene (COT) derivatives can be prepared in good to high yields with high efficiency.
An efficient, unified approach for the synthesis of β-carbolines, γ-carbolines, and other fused azaheteroaromatics has been realized under metal-free conditions, from propargylic amines and (hetero)aromatic aldehydes. This unified strategy provides β- and γ-carbolines as well as a range of fused azaheteroaromatics with a broad substrate scope and excellent functional group compatibility. The formal
Controllable synthesis of pyrido[2,3-<i>b</i>]indol-4-ones or indolo[3,2-<i>b</i>]quinolines <i>via</i> formal intramolecular C(sp<sup>2</sup>)–H functionalization
作者:Bo Song、Mengdan Wang、Murong Xu、Lingkai Kong、Huihui Xie、Chengyu Wang、Yanzhong Li
DOI:10.1039/c9ob02108f
日期:——
controllable synthesis of pyrido[2,3-b]indol-4-ones or indolo[3,2-b]quinolines has been developed by using indole-2-carboxylic derivatives as starting materials. Indole-2-carboxenamines were transformed into pyrido[2,3-b]indol-4-ones through intramolecular N–H/C–H coupling, in which a carbonyl 1,2-migration was involved. Whereas, when indole-2-carboxarylamines were employed, indolo[3,2-b]quinolones were
以吲哚-2-羧酸衍生物为原料,开发了一种新型的铁催化可控合成吡啶并[2,3 - b ]吲哚-4-酮或吲哚[3,2- b ]喹啉的方法。吲哚-2-羧胺通过分子内N–H / C–H偶联转变为吡啶[2,3- b ]吲哚-4-酮,其中涉及羰基1,2-迁移。而当使用吲哚-2-羧芳基胺时,吲哚[3,2- b ]喹诺酮是通过直接的NH / CH偶联而产生的。在温和的反应条件下以中等至良好的收率在宽范围的底物范围内获得所需产物。通过该反应可方便地制备天然产物喹啉啉酮。