Microwave-Assisted Copper-Powder-Catalyzed Coupling and Cyclization of β-Bromo-α,β-unsaturated Carboxylic Acids with 1,3-Diketones Leading to 2H-Pyran-2-ones
作者:Chan Cho、Son Ho、Ho-Sang Sohn
DOI:10.1055/s-0034-1379103
日期:——
Abstract β-Bromo-α,β-unsaturatedcarboxylicacids were coupled and cyclized with 1,3-diketones by microwave irradiation in the presence of a catalytic amount of copper powder and base to give the corresponding 2H-pyran-2-ones in good to high yields. β-Bromo-α,β-unsaturatedcarboxylicacids were coupled and cyclized with 1,3-diketones by microwave irradiation in the presence of a catalytic amount of
A recyclable metal-organic framework MOF-199 catalyst in coupling and cyclization of β-bromo-α,β-unsaturated carboxylic acids with terminal alkynes leading to alkylidenefuranones
作者:Son Long Ho、Il Chul Yoon、Chan Sik Cho、Heung-Jin Choi
DOI:10.1016/j.jorganchem.2015.05.040
日期:2015.8
β-Bromo-α,β-unsaturated carboxylic acids react with terminalalkynes in DMF in the presence of a catalytic amount of metal-organic framework MOF-199 along with a base under microwave irradiation to afford the corresponding alkylidenefuranones in good yields. The catalytic system could be easily recovered and reused 5 times without any loss of catalytic activity.
Palladium-Catalyzed Carbonylative Cyclization of β-Bromo-α,β-unsaturated Carboxylic Acids Leading to Maleic Anhydrides
作者:Chan Cho、Yeon Bae
DOI:10.1055/s-0033-1339309
日期:——
β-Bromo-α,β-unsaturatedcarboxylicacids are carbonylativelycyclized under carbon monoxide pressure in acetic acid in the presence of a catalytic amount of a palladium catalyst along with a base to give the corresponding maleic anhydrides in high yields.
Chemoselective Transformations of Cyclic β-Bromoacrylic Acids with Palladacycles Formed by Aryl Iodides to Access Fused or Spiro Polycycles
作者:Fengru Zhou、Liwei Zhou、Pengyang Jing、Mingjie Sun、Guobo Deng、Yun Liang、Yuan Yang
DOI:10.1021/acs.orglett.2c00254
日期:2022.2.18
A palladium-catalyzed chemoselective decarboxylative annulation of different aryliodides with cyclic β-bromoacrylic acids for the construction of interesting fused and spiro polycycles is disclosed. Notably, cyclic β-bromoacrylic acids can chemoselectively act as C1 or C2 insertion units by the use of different aryliodides. 2-Iodo-N-methacryloylbenzamides can undergo a Heck/[4+2] annulation to afford