Homodimeric coupling–cyclization reaction of 2,3-allenamides
摘要:
The PdCl2/Nal/K2CO3-catalyzed highly stereoselective homodimeric coupling-cyclization reaction of 2,3-allenamides afforded Z-bis(furanimine) derivatives. The addition of K2CO3 is crucial for this reaction and a possible mechanism is proposed. (C) 2009 Elsevier Ltd. All rights reserved.
Access to 1,3-oxazine-2,4-diones/1,3-thiazine-2,4-diones <i>via</i> organocatalytic CO<sub>2</sub>/COS incorporation into allenamides
作者:Hui Zhou、Rui Wang、Hui Zhang、Wei Chen、Xiao-Bing Lu
DOI:10.1039/c9ob02398d
日期:——
Lewis base-CO2/COS adducts were firstly studied as organocatalysts for [4 + 2] annulation of CO2/COS with allenamides to selectively synthesize 1,3-oxazine-2,4-diones/1,3-thiazine-2,4-diones.
Homodimeric coupling–cyclization reaction of 2,3-allenamides
作者:Guofei Chen、Yong Li、Chunling Fu、Shengming Ma
DOI:10.1016/j.tet.2009.03.083
日期:2009.6
The PdCl2/Nal/K2CO3-catalyzed highly stereoselective homodimeric coupling-cyclization reaction of 2,3-allenamides afforded Z-bis(furanimine) derivatives. The addition of K2CO3 is crucial for this reaction and a possible mechanism is proposed. (C) 2009 Elsevier Ltd. All rights reserved.