Compound 8

(6R,6aR,11bR,11cS)-6-Phenyl-7-tosyl-1,6,6a,7,11b,11c-hexahydrocyclopenta[5,6]oxepino[3,4-b]indol-2(4H)-one

From: Asymmetric trapping of zwitterionic intermediates by sulphur ylides in a palladium-catalysed decarboxylation-cycloaddition sequence