Threonine-derived thioureas as bifunctional organocatalysts for enantioselective Michael addition
作者:Zhi Zheng、Jian Lin、Yang Sun、Suoqin Zhang
DOI:10.1016/j.tetlet.2019.151382
日期:2020.1
A series of threonine-derived thioureas were developed through the facile modification of L-threonine chiral scaffold. The enantioselective efficiency were evaluated in the catalytic asymmetric Michaeladdition of 2-hydroxy-1,4-naphthoquinone to nitroalkenes, which afforded the chiral nitroalkylated naphthoquinone derivatives in high yields (up to 93%) and enantio-selectivities (up to 99% ee) under