Stereoselective synthesis of (E)-β-arylvinyl bromides by microwave-induced reaction of anti-3-aryl-2,3-dibromopropanoic acids using an AgOAc–AcOH system
作者:Chunxiang Kuang、Hisanori Senboku、Masao Tokuda
DOI:10.1016/j.tet.2004.10.102
日期:2005.1
(E)-beta-Arylvinyl bromides were stereoselectively prepared in high yields by microwave irradiation of the corresponding anti-3-aryl-2,3-dibromopropanoic acids in AcOH in the presence of AgOAc for 0.5-3.0 min. (C) 2004 Elsevier Ltd. All rights reserved.
The versatile palladium complex Pd(PPh3)4 catalyses both direct arylation and alkenylation of oxazoles efficiently. The method is regioselective and stereospecific with respect to bromoalkenes and tolerates a wide range of functional groups.
Synthesis of β-bromostyrenes from styrenebromohydrins using H-β-zeolite as catalyst under moderate conditions is reported. The catalyst could be regenerated and reused up to three consecutive cycles.
A One-pot Synthesis of Terminal Alkynes from<i>anti</i>-3-Aryl-2,3-dibromopropanoic Acids under Microwave Irradiation
作者:Chunxiang Kuang、Hisanori Senboku、Masao Tokuda
DOI:10.1246/cl.2005.28
日期:2005.1
A facile one-pot synthesis of terminal alkynes was achieved by microwave irradiation of a mixture of anti-3-aryl-2,3-dibromopropanoic acids, Et3N and DMF and subsequent irradiation in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). This method requires short reaction time (1–2 min) and gives terminal alkynes in high yields.