Rhodium-catalyzed asymmetric arylation of α,β-unsaturated imines with arylstannanes. Catalytic asymmetric synthesis of allylic amines
作者:Tamio Hayashi、Mitsuo Ishigedani
DOI:10.1016/s0040-4020(01)00075-8
日期:2001.3
Catalytic asymmetric arylation of N-alkylidenesulfonamides 1a–d, which are prepared from α,β-unsaturated aldehydes and 4-nitrobenzenesulfonamide, with aryltrimethylstannanes 2m–p proceeded in the presence of 3 mol% of a rhodium catalyst coordinated with (R)-MOP ligand in dioxane at 110°C to give sulfonamide of allylic amines (R)-3 with high enantioselectivity (up to 96% ee) in high yields. Some of
由α,β-不饱和醛和4-硝基苯磺酰胺制得的N-烷基亚烷基磺酰胺1a - d与芳基三甲基锡烷2m - p的催化不对称芳基化反应是在3 mol%铑催化剂与(R)-MOP配合下进行的在110°C下在二恶烷中配体形成高收率的烯丙基胺(R)-3磺酰胺,具有高对映选择性(最高96%ee)。通过碳-碳双键的氧化裂解,一些烯丙基胺被转化为(S)-苯基甘氨酸的磺酰胺,而不会损失对映体纯度。