stereoselective synthesis of multifunctionalized tetrahydro-1,2-oxazines (THOs) has been achieved by the organocatalyzed asymmetric tandem alpha-aminoxylation/aza-Michael reaction for the C-O/C-N bond formations in moderate to good yields with excellent diastereo- (>99:1 dr) and enantioselectivities (92% to >99% ee).
通过有机催化的不对称串联α-
氨基羟化/氮杂-迈克尔反应,以适中至良好的收率,具有优异的非对映异构性,可以轻松实现多官能化四氢-1,2-恶嗪(THOs)的立体选择性合成。 99:1 dr)和对映选择性(92%到> 99%ee)。