Photocycloadditions and photosensitizations promoted by electron transfer: β-diketonatoboron difluorides as electron acceptors
作者:Yuan L. Chow、Xianen Cheng
DOI:10.1039/c39900001043
日期:——
The lowest singlet excited state of dibenzoylmethanatoboron difluoride interacts with alkenes by an electron-transfer mechanism to give cycloaddition or alkene dimerization products.
Photocycloaddition of 1,3-Diphenyl-N-methyl Enaminoketonatoboron Difluoride with Simple Olefins
作者:Kuniaki Itoh、Kazuhiko Okazaki、Yoshito Toyotomi
DOI:10.3987/com-02-9575
日期:——
The photoaddition of some cyclic and acyclicolefins to (N-B)-Z-1-difluoroboryloxy-1,3-diphenyl-3-methylimino-1-propene (BF 2 -complex (1)) is discussed. Some of the resulting [2+2] photoadducts produce cyclobutane derivatives having cis configurations. The rearrangements of the cyclobutanes give pyridinium salts and 1,5-diketones. Reaction schemes for the formation of the cyclobutanes are presented