LiClO4-Induced Mannich Reaction − Diastereo- and Enantioselective Synthesis of β-Amino Ketones by Addition of Enamines, Imines or Silylenolethers to Aldehydes and Dialkyltrimethylsilylamines
作者:Afshin Zarghi、M. Reza Naimi-Jamal、Sarah A. Webb、Said Balalaie、M. Reza Saidi、Junes Ipaktschi
DOI:10.1002/(sici)1099-0690(199801)1998:1<197::aid-ejoc197>3.0.co;2-r
日期:1998.1
LiClO4-mediated one-pot reactions of aldehydes with (trimethylsilyl)dialkylamines 2, 5 or 19 and C nucleophiles such as enamines 3, 10 and 12, imines 7 and 11 or (trimethylsilyl)enol ethers 8 and 9 afforded the corresponding aminoalkylation products in high yields. Whereas by using aromatic aldehydes, such as benzaldehyde, pyridine-3-carbaldehyde or thiophene-2-carbaldehyde, high diasteroselectivity
的LiClO 4介导的醛的一锅反应与(三甲基甲硅烷)二烷基胺2,5或19和C的亲核试剂如烯胺3,10和12,亚胺7和11或(三甲基甲硅烷)烯醇醚8和9以高收率得到相应的氨基烷基化产物。通过使用芳族醛,例如苯甲醛,吡啶-3-甲醛或噻吩-2-甲醛,可以实现高的非对映选择性,而脂族醛的异丁醛和新戊醛的氨基烷基化则缺乏非对映选择性。报道了使用手性烯胺22和23的对映选择性曼尼希反应。