Theoretic studies on The Thermal [M+N] Cycloadditions of Fulvenes And 8-Aryl-8-Azaheptafulvenes

• Main Authors: Chou. Cheng-Chu, 周承舉
• Other Authors: 方廷華
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/36097373056374021276

碩士 === 中國文化大學 === 應用化學研究所 === 87 === The main reason of this project is trying to understand the effects of [m+n] cycloaddition of 8-aryl-8-azaheptafulvenes with substituted fulvenes by considering the steric effect, electronic effect, diastereoselectivity, regioselectivity and periselectivity. From the transition state's properties we can know the reaction is syn-endo-[4+2], anti-endo-[4+2] cycloaddition When 8-methylphenyl-8-azaheptafulvenes reacted with 6,6-dimethylfulvenes and with 6,6-diphenylfulvenes, respectively. Also comparing to the energy and electrons population of transition state of syn-endo-[4+2] and anti-endo-[4+2], we can conclude that reaction of 8-methoxyphenyl-8-azaheptafulvenes reacting with 6,6-diphenylfulvenes is anti-endo-[6+4] cycloaddition.