Highly enantioselective and recyclable organocatalytic Michael addition of malonates to α,β-unsaturated aldehydes in aqueous media
作者:Subrata K. Ghosh、Kritanjali Dhungana、Allan D. Headley、Bukuo Ni
DOI:10.1039/c2ob26248g
日期:——
in our lab, has been found to be very effective for the Michael addition reaction in aqueous solvents involving a wide range of α,β-unsaturated aldehydes and malonate derivatives. For the reactions studied, good to excellent yields (73%–96%) and high to excellent enantioselectivities (up to 97%) were obtained using this catalyst. In addition, the catalyst could be recycled up to four times with gradual
我们在实验室中较早开发的新型吡咯烷基有机催化剂已被发现对于涉及多种α,β-不饱和醛和丙二酸酯衍生物的水性溶剂中的迈克尔加成反应非常有效。对于所研究的反应,使用该催化剂可获得良好至优异的产率(73%–96%)和高至优异的对映选择性(高达97%)。此外,在第二个循环后观察到的产率和对映选择性逐渐降低的情况下,催化剂可以循环使用多达四次。