Figure 4: Synthetic applicability.
From: Benzene construction via organocatalytic formal [3+3] cycloaddition reaction
(a) 3n can be transfomed to fluorenone 5 or isoindolone 6 via straightforward processes. (b) 3b could be transformed to indene 7 via reduction followed by Lewis acid-mediated cyclization. NBS, N-bromosuccinimide.
