Efficient Synthesis of 3,6‐Dihydro‐2H‐pyrans via [3+2+1] Annulation Based on the Heteroatom‐free Tri‐atom Donor
作者:Hui Li、Haiping Liu、Yufeng Liu、Zhongzhong Cao、Miaodong Su、Meiqiang Fu、Weiping Luo、Qiang Liu、Cancheng Guo
DOI:10.1002/adsc.201900900
日期:2019.12.3
strategy based on the heteroatom‐free tri‐atom donor to synthesize 3,6‐dihydro‐2H‐pyrans has been developed. In this method, 2‐arylpropylene served as tri‐atom donor to contribute three carbon atoms, the heteroatom was provided by aldehyde, and DMSO served as one carbon donor and solvent. This annulation reaction gave 3,6‐dihydro‐2H‐pyrans in moderate to good yields. Based on the control experiments, a
基于无杂原子的三原子供体合成3,6-二氢-2 H-吡喃的新的[3 + 2 + 1]环空策略已被开发出来。在这种方法中,2-芳基丙烯充当三原子供体,贡献三个碳原子,杂原子由醛提供,而DMSO作为一种碳供体和溶剂。此成环反应产生3,6-dihydro-2 H-吡喃,产率中等至良好。在控制实验的基础上,提出了一种可能的机理。