Cu(OAc)<sub>2</sub> Mediated Synthesis of 3-Sulfonyl Chromen-4-ones
作者:Meng-Yang Chang、Yu-Hsin Chen、Heui-Sin Wang
DOI:10.1021/acs.joc.8b00177
日期:2018.2.16
Copper acetate mediated (4 + 2) annulation of sulfonylacetylenes with salicylic acids provides sulfonyl chromen-4-ones in the presence of benzotriazol-1-yloxy tri(dimethylamino)phosphonium hexafluorophosphate (BOP, Castro’s reagent) and 4-dimethylaminopyridine (DMAP) in MeNO2 at reflux for 3 h. The uses of various metal complexes and activating reagents are investigated for facile and efficient transformation
Stereocontrolled Synthesis of 3-Sulfonyl Chroman-4-ols
作者:Meng-Yang Chang、Yu-Lin Tsai
DOI:10.1021/acs.joc.8b01043
日期:2018.6.15
The stereocontrolled reduction of 3-sulfonyl chromen-4-ones by two synthetic methods, NaBH4/LiCl and Pd/C/H2, provides two kinds of 3-sulfonyl chroman-4-ols with three contiguous chiral centers under different reaction conditions. The use of various reaction conditions is investigated for efficient transformation.
通过两种合成方法NaBH 4 / LiCl和Pd / C / H 2进行立体控制的3-磺酰基铬-4-酮的还原反应,可在不同反应条件下提供具有三个连续手性中心的两种3-磺酰基铬烷-4-醇。 。为了有效转化,研究了各种反应条件的使用。