Eco-Friendly Synthesis of Novel Lariat Ethers via Mannich Reaction under Solventless Conditions
作者:Hashem Sharghi、Reza Khalifeh
DOI:10.3987/com-07-11044
日期:——
An expeditious solventless synthesis of novel lariat ethers using calcium oxide (CaO) via Mannich reaction are herein described. This methodology eliminates the use of excess of solvent during the course of reaction. The reaction time is brought down from hours to minutes (20-30 minutes) along with yield enhancement. The CaO powder can be reused up to three times after simple washing with acetone.
Phosphine free diamino-diol based palladium catalysts and their application in Suzuki–Miyaura cross-coupling reactions
作者:Sasmita Mohanty、D. Suresh、Maravanji S. Balakrishna、Joel T. Mague
DOI:10.1016/j.jorganchem.2009.02.019
日期:2009.6
[Pd(5-tBuC6H3-2-O)CH2(μ-NC4H8N)CH2(5-tBuC6H3-2-O)}] (4) in good yield. The palladium complexes 3 and 4 are employed in Suzuki–Miyauracross-couplingreactions between phenylboronic acid and several aryl chlorides or bromides. They are found to be competent homogeneous catalysts for a variety of substrates to afford the coupled products in good to excellent yields. The crystal structures of compounds
廉价的空气和湿气稳定的二氨基二醇配体[(2--OH-C 10 H ^ 6)CH 2(μ-NC 4 H ^ 8 N)CH 2(C 10 H ^ 6 -2-OH)](1)和[( 5-吨BUC 6 ħ 3 -2-OH)CH 2(μ-NC 4 H ^ 8 N)CH 2(5-吨BUC 6 ħ 3 -2-OH)](2)通过用甲醛相应的醇反应而合成和哌嗪。配体1和2的处理用Pd(OAc)2在1:1个的摩尔比,得到中性钯络合物[钯(OC 10 H ^ 6)CH 2(μ-NC 4 H ^ 8 N)CH 2(C 10 H ^ 6 O)}](3)和[钯(5-吨BUC 6 ħ 3 -2-O)CH 2(μ-NC 4 H ^ 8 N)CH 2(5-吨BUC 6 ħ 3 -2-O)}](4良好)屈服。钯配合物3和4用于苯硼酸与几种芳基氯化物或溴化物之间的Suzuki-Miyaura交叉偶联反应。发现它们是用于各种底