- 作者: 何東英,林瑞僩,何郡軒
- 作者服務機構: Department of Chemistry, National Taiwan University, Taipei, Taiwan, R.O.C.
- 中文摘要: Photorearrangements of o-methoxystilbenoils (1a-1c) in acid media have been investigated. Irradiation of o-methoxystilbene (1c), for example, could lead to three major rearrangement products: 2,3,4-trihydrophenanthren-1-ones (2c), trans-1-arylbut-2-en-1-ones (3c), and 1-hydroxy-9,10-dihydrophenanthrenes (7). Further irradiation of trans-1-arylbut-2-en-1-ones (3) could afford three more products (4, 5 and 6). The key step for this photorearrangement is acid-catalyzed formal [1,9] hydrogen shift. The products of the eliminative and oxidative photoreaction were also obtained; the formation of the oxidative product is due to the fact that the unfavorable methoxy group in the intermediate DHP-3 retards the rate of acid-catalyzed formal [1,9] hydrogen shift.
- 英文摘要: --
- 中文關鍵字: Photorearrangement; Acid catalysis; Protic acid.
- 英文關鍵字: --