Morita-Baylis-Hillman(MBH)加合物直接转化为目标分子是关键过程,其中通常首选烯丙基羟基保护或卤代MBH加合物。在这里,我们报告了叠氮phosph盐(AzPS)催化的直接协议,用于从MBH加合物合成结构上苛刻的(E)/(Z)-肉桂基-1 H -1,2,3-三唑和卤代甲基香豆素。新颖的方法,高效的催化剂以及在温和的反应条件下直接利用MBH加合物,使所报导的方法成为强大的合成工具。
An efficient method is described for the regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles in high yields from a variety of Baylis–Hillman acetates and terminal alkynes with sodium azide using CuI as a catalyst, in either water or polyethylene glycol (PEG). This procedure is operationally simple and environmentally benign. Polyethylene glycol (PEG) serves as an efficient reusable solvent
Azidophosphonium salt-directed chemoselective synthesis of (<i>E</i>)/(<i>Z</i>)-cinnamyl-1<i>H</i>-triazoles and regiospecific access to bromomethylcoumarins from Morita–Baylis–Hillman adducts
commonly preferred. Herein, we report an azidophosphonium salt (AzPS)-catalysed straight forward protocol for synthesising structurally demanding (E)/(Z)-cinnamyl-1H-1,2,3-triazoles and halomethylcoumarins from MBH adducts. The novel methodology, efficient catalyst, and direct utilization of MBH adducts under mild reaction conditions qualify the reported procedures as powerful synthetic tools.
Morita-Baylis-Hillman(MBH)加合物直接转化为目标分子是关键过程,其中通常首选烯丙基羟基保护或卤代MBH加合物。在这里,我们报告了叠氮phosph盐(AzPS)催化的直接协议,用于从MBH加合物合成结构上苛刻的(E)/(Z)-肉桂基-1 H -1,2,3-三唑和卤代甲基香豆素。新颖的方法,高效的催化剂以及在温和的反应条件下直接利用MBH加合物,使所报导的方法成为强大的合成工具。