Co(I)-Catalyzed [3 + 2] Annulation of <i>o</i>-Haloaryl Imines with Alkenes for the Synthesis of Indanamines
作者:Jérôme Paul、Lisa Luong Van My、Myriam Behar-Pirès、Coralie Guillaume、Eric Léonel、Marc Presset、Erwan Le Gall
DOI:10.1021/acs.joc.8b00551
日期:2018.4.6
The use of a CoBr2/1,10-phenanthroline catalytic system together with Zn as the reductant was developed to prepare diversely substituted indanamines by a Co(I)-catalyzed [3 + 2] annulation of o-haloaryl imines with electron-deficient alkenes in good yields. The use of Mn as the reductant allowed the elaboration of a three-component version of this reaction. These conditions were also found to be suitable
Synthesis of Enantioenriched Homopropargylic Sulfonamides by a Three Component Reaction of Aldehydes, Sulfonamides, and Chiral Allenylsilanes
作者:Ryan A. Brawn、James S. Panek
DOI:10.1021/ol901692n
日期:2009.10.1
Enantioenriched allenylsilanes are used as carbon nucleophiles in three-component reactions with in situgenerated N-sulfonylimines to selectively form syn-homopropargylic sulfonamides. The reactions proceed with a variety of aldehyde and sulfonamide reaction partners. These novel reaction products are obtained with useful levels of diastereoselectivity, and the axial chirality of the allenylsilane
对映体富集的丙二烯基硅烷在三组分反应中用作碳亲核试剂,与原位生成的N-磺酰亚胺选择性地形成顺-高炔丙基磺酰胺。反应在各种醛和磺酰胺反应伙伴下进行。这些新的反应产物具有有用的非对映选择性水平,并且丙二烯基硅烷的轴向手性完全转移到点手性,形成具有 >97% ee 的产物。
A catalytic route to dibenzodiazepines involving Buchwald–Hartwig coupling: reaction scope and mechanistic consideration
作者:Daniela Peixoto、Abel Locati、Carolina S. Marques、Albertino Goth、J. P. Prates Ramalho、Anthony J. Burke
DOI:10.1039/c5ra19599c
日期:——
We report a new synthetic method for the synthesis of a family of dibenzodiazepines (DBDAs), employing Pd-catalyzed C–N coupling of o-bromoaldimine, with o-bromoaniline as the key step.