A One-Pot Method for the Synthesis of Phenylalkynyl-Substituted Terminal Alkynes by Deprotection/Stannylation followed by a Migita–Kosugi–Stille coupling
A practical one-pot approach for the synthesis of arylalkynyl-substituted terminalalkynes has been developed through a deprotection/ stannylation of a phenylethynyl phosphine oxide followed by Migita–Kosugi–Stille coupling, avoiding the longer synthetic route involving repeated deprotection/Sonogashira coupling. Other features of this approach include mild reaction conditions, excellent yields, facile
Synthesis of C–N Axially Chiral N-Arylbenzo[g]indoles via a Central-to-Axial Chirality Conversion Strategy
作者:Yuan Sun、Lingzhi Sun、Shaoting Zhang、Zunting Zhang、Tao Wang
DOI:10.1021/acs.orglett.4c01576
日期:2024.6.7
Gold-catalyzed cascade cyclization of diynes for the synthesis of previously unexplored C–Naxially chiral N-arylbenzo[g]indoles was described. The transformation was achieved via a central-to-axial chirality conversion strategy. The chiral conversion exhibited high efficiency. Besides single C–N chiral axis, N-arylbenzo[g]indoles bearing both C–N and C–C chiral axes were also afforded. The title compound
描述了金催化二炔级联环化,用于合成先前未探索的 C-N 轴向手性N-芳基苯并[ g ]吲哚。这种转变是通过中心到轴的手性转换策略实现的。手性转化表现出高效率。除了单一的C-N手性轴外,还提供了带有C-N和C-C手性轴的N-芳基苯并[ g ]吲哚。制备了标题化合物衍生的单膦配体,并在 Pd 催化的不对称烯丙基取代中进行了评估,显示出优异的手性诱导能力。
Polyaromatic Ribbon/Benzofuran Fusion via Consecutive Endo Cyclizations of Enediynes
作者:Philip M. Byers、Julian I. Rashid、Rana K. Mohamed、Igor V. Alabugin
DOI:10.1021/ol302922t
日期:2012.12.7
The Sonogashira/5-endo-dig/6-endo-dig cascade fuses a polycyclic aromatic backbone to the electron-rich furan subunit. The transformation proceeds in modest yields as a one-pot reaction. Efficiency of the full cascade is increased by removal of base prior to the addition of gold catalyst. Under these conditions, conversion to the full cascade products is achieved in nearly quantitative yields without purification of the intermediate products. Extension of the cascade toward triynes opens access to benzofuran-fused chrysene derivatives.
Synthesis of Naphthalenyl Triflates via the Cationic Annulation of Benzodiynes with Triflic Acid
作者:Chenxin Ge、Guohua Wang、Panpan Wu、Chao Chen
DOI:10.1021/acs.orglett.9b01590
日期:2019.7.5
A highly efficient and regioselective annulation of benzodiynes promoted by triflic acid has been developed. This protocol provides a step and atom-economic access to a series of naphthalenyl triflates. Furthermore, direct synthetic applications of this reaction are also elaborated through cross-coupling reactions to generate synthetically useful multisubstituted naphthalenes.