NIS Mediated Cross-Coupling of C(sp<sup>2</sup>)–H and N–H Bonds: A Transition-Metal-Free Approach toward Indolo[1,2-<i>a</i>]quinazolinones
作者:Sindhura Badigenchala、Govindasamy Sekar
DOI:10.1021/acs.joc.7b01080
日期:2017.7.21
A metal- and base-free protocol for intramolecular cross-coupling of C(sp(2))-H and N-H bonds using N-iodosuccinimide (NIS) has been demonstrated. This environmentally benign approach furnishes a series of substituted indolo[1,2-a]quinazolinones from the suitably fabricated indoles via C-N bond forming cyclization in 28-82% yield. A plausible mechanism is proposed for this cyclization based on the results of a control experiment. This Methodology requires no additional metal" catalyst, oxidant, or base. Furthermore, the synthetic utility of the protocol is demonstrated by performing a gram scale reaction.
NOUVEAUX COMPOSES CYCLIQUES SUBSTITUES, LEUR PROCEDE DE PREPARATION ET LES COMPOSITIONS PHARMACEUTIQUES QUI LES CONTIENNENT
申请人:ADIR ET COMPAGNIE
公开号:EP1077927A1
公开(公告)日:2001-02-28
[EN] NOVEL SUBSTITUTED CYCLIC COMPOUNDS, PREPARATION METHOD AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM<br/>[FR] NOUVEAUX COMPOSES CYCLIQUES SUBSTITUES, LEUR PROCEDE DE PREPARATION ET LES COMPOSITIONS PHARMACEUTIQUES QUI LES CONTIENNENT
申请人:ADIR ET COMPAGNIE
公开号:WO1999058495A1
公开(公告)日:1999-11-18
(EN) The invention concerns compounds of formula (I): R-A-R' wherein: A is as defined in the description; R represents a group (V), wherein R'a and R''a are as defined in the description, or R forms with A a cyclic structure as defined in the description; R' represents a (CH2)t-R2 group wherein q, t, and R2 are as defined in the description. The invention is useful for preparing medicines.(FR) L'invention concerne les composés de formule (I): R-A-R' dans laquelle: A est tel que défini dans la description, R représente un groupement (V), -NR'aR''a où R'a et R''a sont tels que définis dans la description, ou R forme avec A une structure cyclique telle que défine dans la description; R' représente un groupement -(CH2)t-R2 dans lequel q, t et R2 sont tels que définis dans la description. Médicaments.