Yoshinori Yamamoto, Shun’ich Murahashi, I. Moritani
1975
Citations
1
Influential Citations
14
Citations
Journal
Tetrahedron
Abstract
Abstract Direct and sensitised photodecompositions of 1-phenyl-diazoethane ( 2 ) were investigated in cis and trans -2-butenes, and also in ethyl ether. In cis -2-butene photosensitisation led to the increased formation of acetophenone ( 5 ) and to loss of stereospecificity of the addition reaction. In ethyl ether an increased yield of 5 was obtained. On the other hand, the yield of styrene ( 4 ), which was produced via 1,2-hydrogen migration, decreased with sensitisation. These results indicate that the spin state in the 1,2-hydrogen migration to the divalent carbon is singlet.