96708-13-3Relevant articles and documents
Photocycloaddition of Some Difluoro(aminoenonato)boron Complexes with Arylalkenes
Itoh, Kuniaki,Okazaki, Kazuhiko,Chow, Yuan L.
, p. 292 - 302 (2007/10/03)
The photocycloaddition of some difluoro [(methylamino- κ N)alkenonato-κO]boron complexes 1 with arylalkenes 2 is discussed. The resulting [2 + 2] photoaddition gave the cyclobutane and azetidine derivatives (Schemes 1, 3, and 5). Rearrangements of the cyclobutane gave 1,5-diketones derivatives (Schemes 2, 4, and 5). The yields of the photoadducts were governed by the reduction and oxidation potentials. Furthermore, the configurations of the products established high regio- and stereoselectivity, suggesting the presence of a singlet exciplex. The reactivity and the stereochemistry were rationalized by means of FMO (frontier molecular orbital) calculations.