Cycloreversion of β-lactams via photoinduced electron transfer
作者:Raúl Pérez-Ruiz、Jose A. Sáez、M. Consuelo Jiménez、Miguel A. Miranda
DOI:10.1039/c4ob01416b
日期:——
With DABCO as an electron donor, photoinduced cycloreversion of β-lactams leads to olefins through 1,4-radical anions and 1,4-biradicals as intermediates.
Ring splitting of azetidin-2-ones via radical anions
作者:Raúl Pérez-Ruiz、Jose A. Sáez、Luis R. Domingo、M. Consuelo Jiménez、Miguel A. Miranda
DOI:10.1039/c2ob26528a
日期:——
The radicalanions of azetidin-2-ones, generated by UV-irradiation in the presence of triethylamine, undergo ring-splitting via N–C4 or C3–C4 bond breaking, leading to open-chain amides. This reactivity diverges from that found for the neutral excited states, which is characterised by α-cleavage. The preference for β-cleavage is supported by DFT theoretical calculations on the energy barriers associated
Titanocene(II)-promoted reaction of anilides with thioacetals followed by treatment with a small amount of water gave reductivealkylation products, anilines with a secondary alkyl group.
Reductive ring contraction of mesoionic thiazol-4-ones to azetidin-2-ones
作者:Tuvia Sheradsky、David Zbaida
DOI:10.1021/jo01299a026
日期:1980.5
Mijin, DuSan Z.; Bozic, Biljana M.; Antonovic, Dusan G., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1997, vol. 36, # 10, p. 934 - 937