Highly Enantioselective Approach to Geminal Bisphosphonates by Organocatalyzed Michael-Type Addition of β-Ketoesters
作者:Marinella Capuzzi、Dario Perdicchia、Karl Anker Jørgensen
DOI:10.1002/chem.200701317
日期:2008.1
developed for the asymmetric synthesis of bisphosphonate derivatives, a class of pharmaceutically important molecules. Cheap and commercially available dihydroquinine effectively catalyzed conjugate additions of cyclic beta-ketoesters to ethylidenebisphosphonate esters, leading to optically active geminal bisphosphonates, bearing an all-carbon substituted quaternary stereocenter, in high yields and
已经开发了一种有价值的有机催化方案,用于一类重要药物双膦酸酯衍生物的不对称合成。廉价且可商购的二氢奎宁可有效催化环状β-酮酸酯与亚乙基双膦酸酯的共轭加成反应,从而形成光学活性双膦双膦酸酯,具有全碳取代的季立体中心,且收率高,对映选择性高达ee的99%。还成功地完成了迈克尔加合物对相应的双膦酸或乙烯基膦酸酯的进一步精制,同时保持了光学纯度。