The first phosphine-catalyzed highly enantioselective [3 + 3] cycloaddition of Morita-Baylis-Hillman carbonates with C,N-cyclicazomethineimines is described. Using a spirocyclic chiral phosphine as the catalyst, a novel class of pharmaceutically interesting 4,6,7,11b-tetrahydro-1H-pyridazino[6,1-a]iso-quinoline derivatives were obtained in high yields with good to excellent diastereoselectivities
C(sp2)−H allylation of racemic trisubstituted allenoates with Morita–Baylis–Hillman (MBH) carbonates to access axially chiral tetrasubstituted allenoates. Various trisubstituted allenoates and MBH carbonates were well tolerated under mild reaction conditions, providing novel chiral tetrasubstituted allenoates with adjacent axial chirality and tertiary carbon stereocenters in high yields with good to excellent
Enantioselective Synthesis of Quinazoline-Based Heterocycles through Phosphine-Catalyzed Asymmetric [3+3] Annulation of Morita−Baylis−Hillman Carbonates with Azomethine Imines
Enantioselective synthesis of chiral quinazoline‐based heterocycles is achieved through a chiral phosphine‐catalyzed [3+3] annulation reaction of quinazoline‐based 1,3‐dipoles with Morita−Baylis−Hillman carbonates. The reaction proceeds smoothly under mild conditions to give various chiral heterocyclic compounds in high yields with excellent diastereoselectivities and enantioselectivities. Further
Chiral Phosphine-Catalyzed Enantioselective [3+2] Annulation of Morita-Baylis-Hillman Carbonates with Cyclic 1-Azadienes: Synthesis of Functionalized Cyclopentenes
catalyst, the asymmetric [3+2] annulation of Morita–Baylis–Hillman carbonates with cyclic 1‐azadienes proceeded smoothly under mild conditions to give various enantiomerically enriched cyclopentene derivatives bearing three consecutive tertiary stereocenters and a sulfamate moiety in moderate to excellent yields with moderate to excellent enantioselectivities and excellent diastereoselectivities.
In this paper, an asymmetricallylicalkylation of easily available azomethine ylides with Morita–Baylis–Hillman (MBH) carbonates through a copper (I)/Lewisbase cooperative catalysis strategy has been realized. The co-catalyzed asymmetricallylicalkylation provided the corresponding amino acid derivatives in up to 90% yields with up to 99% ee as well as good to excellent regioselectivity.
在本文中,通过铜(I)/刘易斯碱协同催化策略实现了易于获得的偶氮甲碱叶立德与 Morita-Baylis-Hillman(MBH)碳酸酯的不对称烯丙基烷基化。共催化的不对称烯丙基烷基化以高达 90% 的产率和高达 99% 的 ee 以及良好至极好的区域选择性提供了相应的氨基酸衍生物。