title: A metal-free hydrogenation of 3-substituted 2H-1,4-benzoxazines.
abstract: A metal-free hydrogenation of 3-substituted 2H-1,4-benzoxazines has been successfully realized with 2.5 mol% of B(C6F5)3 as a catalyst to furnish a variety of 3,4-dihydro-2H-1,4-benzoxazines in 93-99% yields. Up to 42% ee was also achieved for the asymmetric hydrogenation with the use of a chiral diene and HB(C6F5)2.
authors: Beijing National Laboratory of Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. haifengdu@iccas.ac.cn.
authors: Simin
authors: S
authors: Wei
authors: Xiangqing
authors: X
authors: Feng
authors: Haifeng
authors: H
authors: Du