Asymmetric synthesis of tropanes by rhodium-catalyzed [4+3] cycloaddition

作者：Reddy Ravisekhara P; Davies Hum M L^*

来源：Journal of the American Chemical Society, 2007, 129(34): 10312-+.

DOI：10.1021/ja072936e

Rhodium-catalyzed [4 + 3] cycloaddition between methyl 2-(siloxy)vinyldiazoacetate and pyrroles results in the enantioselective synthesis of highly functionalized 8-azabicyclo[3.2.1]octa-2,6-dienes (tropanes). The reaction proceeds via a rhodium-carbenoid intermediate and involves a tandem cyclopropanation/Cope rearrangement mechanism. The optimum chiral dirhodium catalyst for this transformation is the adamantyl glycine-derived complex, Rh-2(S-PTAD)(4).

• 出版日期2007-8-29