Microwave-assisted one-pot synthesis of a, β-unsaturated amides under solvent-free conditions
作者:Shilei Jiang、Yuanyuan Xie、Xiaochun Yu
DOI:10.3184/030823409x393682
日期:2009.1
Undermicrowave-assistedsolvent-freeconditions a one-pot reaction of triphenylphosphine, an aldehyde and N, N-diethyl chloroacetamide in the presence of zinc dust affords α, β-unsaturated amides stereoselectively in good yield. In comparison with the conventional heating method, the reaction was finished within five minutes under microwave irradiation.
在微波辅助的无溶剂条件下,三苯基膦、醛和 N, N-二乙基氯乙酰胺在锌粉存在下的一锅反应以良好的收率立体选择性地提供了 α, β-不饱和酰胺。与传统的加热方法相比,在微波照射下,反应在五分钟内完成。
Synthesis of Cinnamides via Amidation Reaction of Cinnamic Acids with Tetraalkylthiuram Disulfides Under Simple Condition
A facile and convenient protocol for the synthesis of cinnamides from cinnamic acids and tetraalkylthiuram disulfides under metal and additive free conditions has been achieved. This method allows the efficient coupling of diverse cinnamic acids with tetraalkylthiuram disulfides through a simply mixing operation.
An Efficient Catalytic Chromium-Mediated Iodocyclopropanation Reaction: Stereoselective Synthesis of Iodocyclopropanecarboxamides
作者:José M. Concellón、Humberto Rodríguez-Solla、Elena G. Blanco、Santiago García-Granda、and M. Rosario Díaz
DOI:10.1002/adsc.201000574
日期:2011.1.10
catalytic chromium‐mediated novel synthesis of iodocyclopropanecarboxamides is reported. This reaction can be carried out on aromatic (E)‐ or (Z)‐α,β‐unsaturated amides in which the CC double bond is di‐ or trisubstituted. This process takes place with total stereospecificity and the new CI stereogenic center is generated with high stereoselectivity. Some synthetic applications of the obtained iodocyclopropanecarboxamides