Niall P. Hardy, Pol Mac Aonghusa, et al.
Surgical Endoscopy
The photochemical 1,3-adduct of benzene to cis-3,4-dichlorocyclobutene has been transformed in four steps to 2,5-endo-10-oxotricyclo[4.3.1.02,5]deca-3,8-diene 1. The key reaction is the acid catalyzed addition of water to the photoadduct 2 which gives the 3,4-dichloroalcohol 3 corresponding to 1. Similarly the photochemical 1,3-adduct of benzene to cyclobutene has also been cleaved with acid. A more convenient synthesis of 1 is provided by the photochemical 1,3-addition of anisole to cis-3,4-dichlorocyclobutene and the treatment of the adduct with acid. The 3,4-dichloro derivative of 1 is thereby obtained directly. Probable mechanisms for these transformations are discussed. © 1975.
Niall P. Hardy, Pol Mac Aonghusa, et al.
Surgical Endoscopy
Saeel Sandeep Nachane, Ojas Gramopadhye, et al.
EMNLP 2024
D.A. Shirley, Yu Zheng, et al.
Journal of Electron Spectroscopy and Related Phenomena
Eric K. Neumann, Dennis Quan
PSB 2006