1383253-06-2Relevant academic research and scientific papers
Pd(II)-catalyzed asymmetric Wacker-type cyclization for the preparation of 2-vinylchroman derivatives with biphenyl tetraoxazoline ligands
Liu, Qingchuan,Wen, Ke,Zhang, Zhenfeng,Wu, Zhengxing,Zhang, Yong Jian,Zhang, Wanbin
, p. 5209 - 5215 (2012/08/08)
This article describes an efficient method for the preparation of chiral chroman derivatives by the Pd(II)-catalyzed asymmetric Wacker-type cyclization using a chelation-induced axially chiral tetraoxazoline ligand. Under the optimized conditions, up to 80% yield and up to 92% ee were obtained. This is the first example to utilize o-trisubstituted 3-butenylphenols as substrates in such transformation.
