Type I and type II photochemical reaction of ω-isobutyryl-ω-methyl-2,3-benzocycloalk-2-en-1-ones
作者:Michikazu Yoshioka、Masahiro Saitosh、Hideaki Arai、Keiji Ichikawa、Tadashi Hasegawa
DOI:10.1016/s0040-4020(01)87699-7
日期:1987.1
ω-Isobutyryl-ω-methyl-2,3-benzocycloalk-2-en-l-ones. (6a-c) undergo both type I and type II photoreactions. The type I/type II product ratio depends on the ring size; the six-membered ketone 6a is subject to type II reaction and the eight-membered ketone 6c is subject to type I reaction predominantly. The cyclization/elimination ratio of the type II reaction of 6 also depends on the ring size; the ratio decreases with
ω-异丁酰基-ω-甲基-2,3-苯并环烷基-2-en-1-酮。(6a-c)经历I型和II型光反应。I / II型产品的比例取决于环的大小;六元酮6a主要经受II型反应,而八元酮6c主要经受I型反应。II型反应6的环化/消除比率也取决于环的大小;该比率随环尺寸的增加而减小。