... Both Camaggi's group 3 and Haszeldine's group 4 explored the chemistry of the Dewar ... and Sket 7 carried out photocycloadditions of 1 to unsaturated hydrocarbons, and Barlow and co ... 42 The adduct with N-benzylpyrrole (49) underwent retro-Diels−Alder reaction upon flash ...