Stereoselective synthesis of a <i>Podophyllum</i> lignan core by intramolecular reductive nickel-catalysis
作者:Jian Xiao、Xiao-Wei Cong、Gui-Zhen Yang、Ya-Wen Wang、Yu Peng
DOI:10.1039/c8cc00001h
日期:——
A Ni-catalyzed reductive cascade to a diastereocontrolled construction of THN[2,3-c]furan, is developed. The mild reaction conditions led to the tolerance of broad functional groups that can be placed in almost every position of this skeleton with good yields. The conformational control for the observed trans- or cis-fused selectivity during this tandem cyclization-coupling is also proposed.
镍催化还原还原级联的非对映体控制的THN [2,3-c]呋喃。温和的反应条件导致了宽泛的官能团的耐受性,这些官能团几乎可以以良好的产率置于该骨架的每个位置。还提出了在串联环化偶联过程中观察到的反式或顺式融合选择性的构象控制。