Expedient synthesis of densely substituted pyrrolo[1,2-a]indoles
作者:Dattatraya H. Dethe、Raghavender Boda
DOI:10.1039/c6ob00861e
日期:——
indolyl-2-carbinols with various dienophiles such as indole derived α,β-unsaturated esters, ketones, nitriles and cinnamates is described. The strategy was further applied for the synthesis of optically active pyrrolo[1,2-a]indoles in >97% de using the chiral auxiliary based approach.
描述了Cu(OTf)2催化吲哚基-2-甲醇与各种双亲物如吲哚衍生的α,β-不饱和酯,酮,腈和肉桂酸酯的[6 + 2]环加成反应。该策略进一步被应用到基于手性助剂的合成中,以> 97%de的光学活性吡咯并[1,2- a ]吲哚合成。
A Novel Pd-Catalysed Annulation Reaction for the Syntheses of Pyrroloindoles and Pyrroloquinolines
作者:Dattatraya H. Dethe、Raghavender Boda
DOI:10.1002/chem.201503652
日期:2016.1.4
Pd‐catalysed annulationreactions between indole derivatives and internal alkyne esters leading to various pyrrolo[1,2‐a]indoles and pyrroloquinolines have been developed. The strategy involves an intermolecular addition of the indole nitrogen on to the internal alkyne ester followed by an intramolecular insertion of a vinyl–palladium complex into the carbonyl group. This method offers a facile and
吲哚衍生物与内部炔烃酯之间的钯催化环化反应已开发出各种吡咯并[1,2- a ]吲哚和吡咯并喹啉。该策略涉及将吲哚氮分子间添加到内部炔烃酯上,然后将乙烯基钯复合物分子内插入羰基中。该方法为吡咯并[1,2- a ]吲哚和吡咯并喹啉提供了一种简便实用的方法。
Palladium-catalyzed cross-coupling reaction: Direct allylation of aryl bromides with allyl acetate
Various arylbromides underwent a palladium-catalyzed cross-coupling reaction with allyl acetate in the presence of hexa-n-butylditin to give the allylated products in very high yields.
A new approach to 1-substituted β-carbolines and isoquinolines utilizing tributyl[(Z)-2-ethoxyvinyl]stannane as a C-3,C-4 building block
作者:Alexandra Kamlah、Florian Lirk、Franz Bracher
DOI:10.1016/j.tet.2015.12.049
日期:2016.2
from readily available indole-2-carboxylic acids, 1-substituted β-carbolines (among them the alkaloids harmane and isoharmine) are readily obtained via the corresponding 2-acylindoles, bromination at C-3, followed by a one-pot Stille cross-coupling with tributyl[(Z)-2-ethoxyvinyl]stannane, and ring closure with ammonium acetate. 1-Substitutedisoquinolines are available in an analogous manner starting
Total synthesis of (±)-debromoflustramine B via [4+1] cyclization of a bis(alkylthio)carbene and an indole isocyanate
作者:Saptarshi De、James H. Rigby
DOI:10.1016/j.tetlet.2013.06.119
日期:2013.8
An efficient totalsynthesis of (±)-debromoflustramine B and (±)-debromoflustramide B has been achieved, through a novel [4+1] cyclization of an indole isocyanate and bis(alkylthio)carbene.