Amat, Mercedes; Bosch, Joan; Hidalgo, Jose; Canto, Margalida; Perez, Maria; Llor, Nuria; Molins, Elies; Miravitlles, Carles; Orozco, Modesto; Luque, Javier Journal of Organic Chemistry, 2000 , vol. 65, # 10 p. 3074 - 3084