Tricarbonyl(dihydroazepinyl)chromium Complexes and Methylenepyrrolidines from (2′-Dimethylaminoethenyl)carbenechromium Complexes - Schirmer, Heiko; Labahn, Thomas; Flynn, Bernard; Wu, Yao-Ting; de Meijere, Armin (Synlett, 1999)