One-Pot Knoevenagel and [4 + 2] Cycloaddition as a Platform for Calliviminones
作者:Pritam Roy、S. Rehana Anjum、Dhevalapally B. Ramachary
DOI:10.1021/acs.orglett.0c00518
日期:2020.4.17
Bioactive compounds featuring an unusual core of spiro[5.5]undecenes and calliviminones were synthesized in very good yield with good regio- and diastereoselectivities through a one-pot Knoevenagel and [4 + 2] cycloaddition from the readily available aldehydes, cyclic-1,3-diones, dienes, and a catalytic amount of (s)-proline.