Gold-Catalyzed Cyclization of 1,6-Diyne-4-en-3-ols: Stannyl Transfer from 2-Tributylstannylfuran Through Au/Sn Transmetalation
作者:Yifeng Chen、Ming Chen、Yuanhong Liu
DOI:10.1002/anie.201201523
日期:2012.6.18
Gold‐tinted: A gold catalyzed cyclization reaction of 1,6‐diyne‐4‐en‐3‐ols, incorporating an in situ stannyltransfer reaction involving 2‐tributylstannylfuran, gives synthetically valuable 2‐stannylnaphthalenes (see scheme; DCE=dichloroethane). A gem‐diaurated furan complex, was isolated and fully characterized by X‐ray crystallographic analysis, and provides strong evidence for a tin to gold transmetalation
Cobalt-catalyzed regioselective syntheses of indeno[2,1-<i>c</i>]pyridines from nitriles and diynes bearing propargyl fragments
作者:Murong Xu、Zhong Zheng、Mengdan Wang、Lingkai Kong、Yujuan Ao、Yanzhong Li
DOI:10.1039/c8ob02419g
日期:——
highly efficient CoI2/o-phenanthroline catalyzed cycloaddition reaction of diynes bearing TBS protected propargylicalcohol fragments with nitriles has been developed. This methodology offers regioselective access, with good functional group tolerance, to various indeno[2,1-c]pyridine derivatives in moderate to excellent yields. It was found that o-phenanthroline as a bidentate nitrogen ligand showed
已开发出一种高效的CoI 2 /邻菲咯啉催化带有TBS保护的炔丙醇片段的丁炔与腈的环加成反应。该方法以中等至优异的产率提供了对多种茚并[2,1- c ]吡啶衍生物的区域选择性通路,具有良好的官能团耐受性。发现邻菲咯啉作为二齿氮配体在该环加成反应中显示出高功效。
Gold-Catalyzed Cascade Friedel-Crafts/Furan-Yne Cyclization/Heteroenyne Metathesis for the Highly Efficient Construction of Phenanthrene Derivatives
作者:Yifeng Chen、Guijie Li、Yuanhong Liu
DOI:10.1002/adsc.201000644
日期:2011.2.11
A rapid access to highly substituted phenanthrenyl ketones through gold-catalyzedcyclization of 1,6-diyn-4-en-3-ols with furans has been developed. Gold catalysts are effective to catalyze three cascade processes involving Friedel–Crafts/furan-ynecyclization/heteroenynemetathesis through CO bond and alkyne activation. This method offers several advantages such as high selectivities and easily accessible
Gold(I)-Catalyzed Regioselective Cyclization to Access Cyclopropane-Fused Tetrahydrobenzochromenes
作者:Perla Bharath Kumar、Chittala Emmaniel Raju、Patel Hinal Chandubhai、Balasubramanian Sridhar、Galla V. Karunakar
DOI:10.1021/acs.orglett.2c02564
日期:2022.9.23
Gold(I)-catalyzedefficient synthetic transformation was achieved to access the tetrahydrobenzo[h]cyclopropa[c]chromenes from allyl-substituted 1,6-diynes. Cyclopropane-fused tetrahydrobenzochromenes were obtained regioselectively in ≤92% yields. In this atom-economic organic transformation, three new C–C bonds were formed sequentially in one pot.
实现了金(I)催化的高效合成转化,以从烯丙基取代的 1,6-二炔中获得四氢苯并[ h ]环丙[ c ]色烯。以≤92% 的产率区域选择性地获得了环丙烷稠合的四氢苯并色烯。在这种原子经济有机转化中,三个新的 C-C 键在一锅中依次形成。