First Example of an Enone−Alkene [2 + 2 + 2] Photocycloaddition: 1,3-Photocycloaddition of Tetramethylethylene across 2,7-Cyclooctadienone
摘要:
[GRAPHICS]Irradiation of cyclooctadienone (1) in the presence of tetramethylethylene (TME) produces 9,10,10-tetramethyl-11 oxatricyclo[6.3.0.0(1,7)]undec-2- ene (7) in 33% yield, This reaction is the first example of a 1,3-cycloaddition of an alkene across an enone system. This novel cycloaddition suggests that there is substantial interaction between the carbonyl carbon and the beta-enone carbon in the triplet excited state of 1.
First Example of an Enone−Alkene [2 + 2 + 2] Photocycloaddition: 1,3-Photocycloaddition of Tetramethylethylene across 2,7-Cyclooctadienone
作者:Albert R. Matlin、Susanne C. Lin、Hiren R. Patel、Minghui Chai
DOI:10.1021/ol990055+
日期:1999.7.1
[GRAPHICS]Irradiation of cyclooctadienone (1) in the presence of tetramethylethylene (TME) produces 9,10,10-tetramethyl-11 oxatricyclo[6.3.0.0(1,7)]undec-2- ene (7) in 33% yield, This reaction is the first example of a 1,3-cycloaddition of an alkene across an enone system. This novel cycloaddition suggests that there is substantial interaction between the carbonyl carbon and the beta-enone carbon in the triplet excited state of 1.