关键词: 光化学反应, 反应机理, 呋喃 P, 环化, 甲氧基, 香豆素 P, 烯烃 P, 加成反应

The photocycloaddition of 8-methoxypsoralen to cyclothexene and to heptene-1 was found to give 3,4-dihydrobicyclo (4,2,0) octano (7",8":3,4) 8-methoxypsoralen (4) and a mixture of 3, 4-dihydro-(1-n-pentyl) cyclobutano-(2", 3":3,4) 8-methoxypsoralen (5) and the isomer 6 respectively. Stern-Volmer plot and quenching studies indicate that the reaction proceeds via psoralen triplet excited state.

Key words: PHOTOCHEMICAL REACTION, REACTION MECHANISM, FURAN P, CYCLIZATION, METHOXY GROUP, COUMARIN P, ALKENE P, ADDITION REACTION