作者:Sandip Murarka、Zhi-Jun Jia、Christian Merten、Constantin-G. Daniliuc、Andrey P. Antonchick、Herbert Waldmann
DOI:10.1002/anie.201502233
日期:2015.6.22
We report a rhodium(II)‐catalyzed highly enantioselective 1,3‐dipolar cycloaddition reaction between the carbonyl moiety of tropone and carbonyl ylides to afford troponoids in good to high yields with excellent enantioselectivity. We demonstrate that α‐diazoketone‐derived carbonyl ylides, in contrast to carbonyl ylides derived from diazodiketoesters, undergo [6+3] cycloaddition reactions with tropone
我们报告了铑(II)催化的高效率对苯二酚的羰基部分和羰基内酯之间的高对映选择性1,3-偶极环加成反应,以良好的对映选择性提供了高至高收率的类生物碱。我们证明,与重氮二酮酸酯衍生的羰基酰基化物相比,α-二氮杂酮衍生的羰基酰基化物与tropone经历[6 + 3]环加成反应,以产生具有出色立体选择性的相应桥联杂环。