Silver Tetrafluoroborate-Catalyzed Oxa-Diels-Alder Reaction Between Electrically Neutral Dienes and Aldehydes
作者:Xiaodong Zou、Lizheng Yang、Xiangli Liu、Hao Sun、Hongjian Lu
DOI:10.1002/adsc.201500487
日期:2015.10.12
Chemoselective oxa-Diels–Alder reactions between electrically neutral 1,3-dienes and various aldehydes were achieved using the commercially available silver tetrafluoroborate (AgBF4) as catalyst. This catalytic process has high functional group tolerance. Heteroatoms at the β-position of the aryl aldehydes can greatly promote the reactivity of the substrates even with heterocyclic aldehydes that were
使用市售的四氟硼酸银(AgBF 4)作为催化剂,可以实现电中性1,3-二烯与各种醛之间的化学选择性oxa-Diels-Alder反应。该催化过程具有较高的官能团耐受性。即使以前认为杂环醛对oxa-Diels-Alder反应没有反应性,芳基醛的β-位上的杂原子也可以极大地提高底物的反应性。另外,具有β-杂原子取代的丙烯醛也是良好的底物。室温下,丙烯醛与化学计量简单的1,3-二烯之间的oxa-Diels-Alder反应实现了高化学选择性和区域选择性。