Asymmetric Organocatalytic Michael/Henry Domino Reactions through Hydrogen-Bond Activation: Kinetic Access to Indane Scaffolds Bearing<i>cis</i>-Vicinal Substituents
作者:Charles C. J. Loh、Iuliana Atodiresei、Dieter Enders
DOI:10.1002/chem.201302131
日期:2013.8.12
cis! A bifunctional hydrogen‐bond‐catalyzed Michael/Henry dominoreaction allows preferential asymmetric access to the kinetic cis‐nitroindanol products with excellent enantioselectivity through a postulated matched transition state (see scheme; H‐Bo = hydrogen bond activation). This high yielding protocol opens up a new strategy to access highly useful enantio‐enriched cis‐aminoindanol‐containing
Enantioselective Synthesis of Tetrahydrocarbazoles through a Michael Addition/Ciamician-Plancher Rearrangement Sequence: Asymmetric Synthesis of a Potent Constrained Analogue of MS-245
作者:Charles C. J. Loh、Gerhard Raabe、Dieter Enders
DOI:10.1002/chem.201202908
日期:2012.10.15
Awakening an ancient rearrangement: A one‐pot sequential Friedel–Crafts‐type Michaeladdition/Ag+‐mediated Ciamician–Plancherrearrangement reaction on C2,C3‐nonsubstituted indoles can be used for accessing enantiomerically enriched pharmaceutically relevant 1,2,3,4‐tetrahydrocarbazoles. The methodology was applied in an enantioselective total synthesis of a highly potent serotonin 5‐HT6 receptor antagonist
唤醒古老的重排:对C2,C3未取代的吲哚进行一锅法式Friedel-Crafts型Michael加成反应/ Ag +介导的Ciamician-Plancher重排反应可用于获得对映体富集的与药物相关的1,2,3,4 ‐四氢咔唑 该方法用于高效5-羟色胺5-HT 6受体拮抗剂的对映选择性全合成(参见方案)。