Direct Access to 1,1-Dicarbonyl Sulfoxonium Ylides from Aryl Halides or Triflates: Palladium-Catalyzed Carbonylation
作者:Yang Yuan、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b01926
日期:2019.7.5
The synthesis of 1,1-dicarbonyl sulfoxonium ylides by palladium-catalyzed carbonylation of aryl halides or triflates with α-carbonyl sulfoxonium ylides has been developed for the first time. This method provides a general approach to synthetically useful 1,1-dicarbonyl sulfoxonium ylides in high efficiency. The protocol displays a wide substrate scope, showing that the resulting 1,1-dicarbonyl sulfoxonium
Pd-catalyzed synthesis of α,β-unsaturated ketones by carbonylation of vinyl triflates and nonaflates
作者:Shaoke Zhang、Helfried Neumann、Matthias Beller
DOI:10.1039/c9cc02210d
日期:——
A general and highly chemoselective Pd-catalyzed protocol for the synthesis of α,β-unsaturated ketones by carbonylation of vinyl triflates and nonaflates is presented. Applying the specific monophosphine ligand cataCXium® A, the synthesis of various vinyl ketones as well as carbonylated natural product derivatives proceeds in good yields.
Pd-Catalyzed Carbonylation of Vinyl Triflates To Afford α,β-Unsaturated Aldehydes, Esters, and Amides under Mild Conditions
作者:Shaoke Zhang、Helfried Neumann、Matthias Beller
DOI:10.1021/acs.orglett.9b00765
日期:2019.5.17
An efficient and general protocol for the synthesis of α,β-unsaturated aldehydes, esters, and amides via carbonylation of vinyl triflates including derivatives of camphor, ketoisophorone, verbenone, and pulegone was developed. Crucial for these transformations is the use of a specific palladium catalyst containing a pyridyl-substituted dtbpx-type ligand. This procedure also allows for an easy access
开发了一种有效的通用方案,可通过乙烯基三氟甲磺酸酯的羰基化反应合成α,β-不饱和醛,酯和酰胺,包括樟脑,酮异佛尔酮,马鞭草酮和普乐酮。这些转化的关键是使用含有吡啶基取代的d t bpx型配体的特定钯催化剂。该方法还使得容易从相应的酮获得二羰基化产物。