Intramolecular reactivity of functionalized arylcarbenes: 7-alkenyloxy-1-indanylidenes
作者:Frank Gotzhein、Wolfgan Kirmse
DOI:10.1016/s0040-4039(97)00091-9
日期:1997.2
1,2-H shift is the only intramolecular reaction of 7-(1-propenyloxy)-1-indanylidenes (8) whereas 7-(2-propenyloxy)-1-indanylidene (13) and 7-(2-butenyloxy)-1-indanylidenes (19) undergo addition to the side-chain CC bond and 1,2-H shifts competitively. Owing to the small RCR bond angle of 1-indanylidenes, the intramolecular chemistry is dominated by the singlet state even if the carbenes are generated
1,2-H移位是7-(1-丙烯氧基)-1-茚二烯(8)的唯一分子内反应,而7-(2-丙烯氧基)-1-茚二烯(13)和7-(2-丁烯氧基)- 1-茚基亚烷基(19)除侧链CC键外,还具有1,2-H竞争性移位。由于1-茚二酮的RCR键角小,即使通过三重敏化光解产生了卡宾(k TS > K T),分子内化学仍受单重态的支配。