Fig. 7. Re–Re and Re–Si TS conformations, resulting in (S,R) and (S,S) stereoisomers. For the fixed Re enamine. The C–C bond being formed is perpendicular to the sheet and marked with a circle. The paperchain representation showcases the ring puckering conformation, with the red color representing the planar aromatic ring and colors yellow, green, and blue represent distinct ring puckering. See original reference for additional information.
