中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
6-苄氨基-1-己醇 | 6-(benzylamino)hexan-1-ol | 133437-08-8 | C13H21NO | 207.316 |
—— | N-benzylperhydroazocine | 65486-43-3 | C14H21N | 203.327 |
1-苄基-2-甲基哌啶 | 1-benzyl-2-methylpiperidine | 777-38-8 | C13H19N | 189.301 |
—— | 1-benzyl-2-methylpiperidine | —— | C13H19N | 189.301 |
—— | (S)-N-benzyl-2-methylpiperidine | 149070-87-1 | C13H19N | 189.301 |
Rhodium-catalysed reactions of N-benzyl- or N-alkyl-aminoalkenes (6) with H2/CO can give cyclic amines (7) (7–13 ring size) in good to excellent yields when BIPHEPHOS is used as a ligand. Hydrogenation of the aminoalkene becomes a competing reaction for the smaller rings but can be overcome by using a H2/CO gas ratio of 1 : 5. Reactions of 2-alkenyloxybenzylamines (13) gave 9-, 12- and 17-membered rings (14) in 30–40% yield, but dimer formation (16) and/or hydrogenation were competing reactions. Similar reactions of alkenylamides and ortho-alkenylanilines gave only non-cyclized amino aldehydes as products in low isolated yields.