An Enantioselective Organocatalytic Approach to Both Enantiomers of Lasubine II
摘要:
A concise stereoselective route providing access to both enantiomers of the bioactive quinolizidine alkaloid lasubine II has been developed. The enantioselectivity was introduced by taking advantage of a proline-catalyzed asymmetric Mannich reaction. Next, the bicyclic system was constructed via a diastereoselective Mannich cyclization and subsequent ring-closing metathesis as the key steps.
An Enantioselective Organocatalytic Approach to Both Enantiomers of Lasubine II
摘要:
A concise stereoselective route providing access to both enantiomers of the bioactive quinolizidine alkaloid lasubine II has been developed. The enantioselectivity was introduced by taking advantage of a proline-catalyzed asymmetric Mannich reaction. Next, the bicyclic system was constructed via a diastereoselective Mannich cyclization and subsequent ring-closing metathesis as the key steps.
An Enantioselective Organocatalytic Approach to Both Enantiomers of Lasubine II
作者:Jorge M. M. Verkade、Ferdi van der Pijl、Marian M. J. H. P. Willems、Peter J. L. M. Quaedflieg、Floris L. van Delft、Floris P. J. T. Rutjes
DOI:10.1021/jo900141f
日期:2009.4.17
A concise stereoselective route providing access to both enantiomers of the bioactive quinolizidine alkaloid lasubine II has been developed. The enantioselectivity was introduced by taking advantage of a proline-catalyzed asymmetric Mannich reaction. Next, the bicyclic system was constructed via a diastereoselective Mannich cyclization and subsequent ring-closing metathesis as the key steps.