Organocatalytic Asymmetric Synthesis of Spiro-Bridged and Spiro-Fused Heterocyclic Compounds Containing Chromane, Indole, and Oxindole Moieties
作者:Zhi-Hao You、Ying-Han Chen、Yu Tang、Yan-Kai Liu
DOI:10.1021/acs.orglett.8b02731
日期:2018.11.2
applied to the asymmetric synthesis of spiro-bridged and spiro-fused heterocyclic compounds, which combined chromane, indole, and oxindole, three potential pharmacophores, in one molecule. The power of these two organocatalytic pathways is underscored by mild reaction conditions and high efficiency in the production of synthetically challenging, but biologically important heterocyclic products, which could
Organocatalyst-Mediated Dynamic Kinetic Enantioselective Acylation of 2-Chromanols
作者:Daniel A. Glazier、John M. Schroeder、Jitian Liu、Weiping Tang
DOI:10.1002/adsc.201800994
日期:2018.12.3
We recently developed a novel chiral catalyst‐directed dynamic kinetic diastereoselective acylation of hemiacetals for the synthesis of carbohydrates. In this update, we describe a catalytic method for the dynamic kinetic enantioselective acylation of 2‐chromanols using benzotetramisole derived catalysts. High yields and enantiomeric excesses were obtained for a broad range of acylated 2‐chromanols