Silver-catalyzed Double Decarboxylative Radical Alkynylation/Annulation of Arylpropiolic Acids with α-keto Acids: Access to Ynones and Flavones under Mild Conditions
Ynones are privileged buildingblocks in various organic syntheses of heterocyclicderivatives due to their multifunctional nature, and flavones are an important class of natural products with a wide range of biological activities. We describe the catalytic double decarboxylative alkynylation of arylpropiolic acids with α‐keto acids. With Ag(I)/persulfate as the catalysis system, the valuable ynones
Cs<sub>2</sub>CO<sub>3</sub>-Promoted One-Pot Synthesis of Alkynylphosphonates, -phosphinates, and -phosphine Oxides
作者:Yulei Wang、Jiepeng Gan、Liu Leo Liu、Hang Yuan、Yuxing Gao、Yan Liu、Yufen Zhao
DOI:10.1021/jo500312n
日期:2014.4.18
trialkyl phosphites, ethyl diphenylphosphinite, or diethyl phenylphosphonite has been developed under metal-free conditions, providing a practical and powerful tool for one-pot synthesis of valuable alkynylphosphonates, -phosphinates, and -phosphine oxides in good to excellent yields.
在无金属条件下开发了一种新颖且有效的Cs 2 CO 3促进的各种1,1,1-二溴-1-烯烃与容易获得的亚磷酸三烷基酯,乙基二苯基亚膦酸酯或二乙基苯基亚膦酸酯的磷酸化或亚膦酰基化,提供了实用而有效的方法一锅合成有价值的炔基膦酸酯,-次膦酸酯和-膦氧化物的工具,产率很高。
Visible Light‐Catalyzed Decarboxylative Alkynylation of Arenediazonium Salts with Alkynyl Carboxylic Acids: Direct Access to Aryl Alkynes by Organic Photoredox Catalysis
salts have been utilized as the aryl radical source to couple alkynyl carboxylic acids to feature the decarboxylative arylation. A wide range of substrates are amenable to this protocol with broad functional group tolerance, and diversely‐functionalized aryl alkynes could be synthesized undermild, neutral and transition metal‐free reaction conditions using visiblelight irradiation. Alongside synthetic
Benzocycloheptynedicobalt Complexes by Intramolecular Nicholas Reactions
作者:James R. Green、Yu Ding
DOI:10.1055/s-2004-837215
日期:——
Lewis acid mediated intramolecular Nicholas reactions of aryl (Z)-enyne propargyl acetate-Co2(CO)6 complexes 1 afford benzocycloheptenyne-Co2(CO)6 complexes 2 and their heterocyclic analogues.