Stereoselective Synthesis of (Z)-a-Phenoxymethylene-g-butyrolactone and Its Sulfur Analogues from 2-Propynyloxy- or 2-Propynylthiobenzene
摘要:
The preparations of (Z)-alpha -phenoxymethylene-gamma -butyrolactone, alpha -phenoxymethyl-gamma -butyrolactone, (Z)-alpha -phenylthiomethylene-gamma -butyrolactone, and alpha -phenylthiomethyl-gamma -butyrolactone derivatives from 2-propynyloxy-benzene and 2-propynylthiobenzene were described.
Stereoselective Synthesis of (Z)-a-Phenoxymethylene-g-butyrolactone and Its Sulfur Analogues from 2-Propynyloxy- or 2-Propynylthiobenzene
摘要:
The preparations of (Z)-alpha -phenoxymethylene-gamma -butyrolactone, alpha -phenoxymethyl-gamma -butyrolactone, (Z)-alpha -phenylthiomethylene-gamma -butyrolactone, and alpha -phenylthiomethyl-gamma -butyrolactone derivatives from 2-propynyloxy-benzene and 2-propynylthiobenzene were described.
Gold(III)‐Catalyzed Intermolecular Oxidation‐Cyclization of Ynones: Access to 4‐Substituted Chroman‐3‐ones
作者:Jian Li、Fang Yang、Yang‐Ting Ma、Kegong Ji
DOI:10.1002/adsc.201900260
日期:2019.4.23
A synthesis of 4‐substituted chroman‐3‐one derivatives has been developed through a gold(III) catalyzed oxidation‐cyclization of ynones in good to excellent yield using easily prepared substrates. A broad range of synthetically useful functional groups (halide, alkene, alkyne, phenolic hydroxyl) were tolerated. Further application of this method paves a new way to prepare the skeleton of oblarotenoids