Highly enantioselective Michael addition of 2-alkoxyphenyl esters of α-substituted β-keto acids to non-prochiral α,β-unsaturated carbonyl compounds catalyzed by sodium 2′-[2-(2-methoxyethoxy)ethoxy]-1,1′-binaphthalen-2-oxide
作者:Toyohiro Otani、Wataru Namatame、Yasufumi Tamai
DOI:10.1016/j.tetlet.2014.10.146
日期:2014.12
The enantioselective Michael addition of 2-alkoxyphenyl esters of α-substituted β-keto acids to non-prochiral α,β-unsaturated carbonyl compounds catalyzed by 5–10 mol % of sodium 2′-[2-(2-methoxyethoxy)ethoxy]-1,1′-binaphthalen-2-oxide afforded the desired adducts in high yields with up to 97% ee.
5-10 mol%的钠2'-[2-(2-甲氧基乙氧基)乙氧基]催化α-取代的β-酮酸的2-烷氧基苯基酯对非手性α,β-不饱和羰基化合物的对映选择性迈克尔加成-1,1'-联萘-2-氧化物以高收率提供了所需的加合物,ee最高可达97%。