Technical Notes：

1.Catalyst for the asymmetric Michael addition of a, a-disubstituted aldehydes to maleimides .

2.Used in the enantioselective synthesis of trans dihydrobenzofurans via intramolecular Michael addition.

3.Organocatalyst for the enantioselective direct vinylogous aldol reaction of 3-methyl 2-cyclohexen-1-one with a-keto esters.

4.Organocatlyst for enantioselective F riedel-Crafts alkylations of furans.

5.Catalyst for the regio- and diastereodivergent 4+2 cycloadditions with cyclic 2,4-Dienones.