Fluorinated acetylenes. Part 11. Reaction of [1,1-bis(3,3,3-trifluoropropynyl)]ethyl ethanoate with cyclohexa-1,3-diene and of [α,a-bis(3,3,3-trifluoropropynyl)]benzyl benzoate with norbornadiene and diazomethane
作者:Michael G. Barlow、Sabiha Tajammal、Anthony E. Tipping
DOI:10.1016/s0022-1139(00)80403-0
日期:1993.7
corresponding benzoate ester (CF3CC)2CPhO2CPh (1b) at 150 °C gave a complex mixture of unidentified products; reaction did not occur at 100 °C. Facile reaction occurred between diazomethane and the ester 1b at 0 °C to give [α,α-bis(4-trifluoromethylpyrazol-3-yl)]benzyl benzoate (16) and [α-(1-methyl-4-trifluoromethylpyrazol-5-yl)-α-(4-trifluoromethylpyrazol-3-yl)]benzyl benzoate (15) and hence [α,α-bis(1-m
环己-1,3-二烯与dialkynyl酯(CF反应3 CC)2 CM ë Ò 2 CM ë(1A)在70℃下使两种非对映(比率9:2)的混合物中的狄尔斯的-Al醛加合物[2-(2-乙酰氧基-5,5,5-三氟戊-3-yn-2-基)-3-三氟甲基]双环[2.2.2]八-2,5-二烯(3),其中在100℃下热解,主要得到2-(2-乙酰氧基-5,5,5-三氟戊-3-yn-2-基)苯并三氟化物(4)及其少量的水合产物2-(2-乙酰氧基-5,5,5-三氟戊-3-一-2-基)苯并三氟化物(5)。降冰片二烯和相应的苯甲酸酯之间试图环加成(CF 3 CC)2 CPhO 2 CPh(1b)在150°C下得到复杂的身份不明的产物混合物;在100°C时未发生反应。重氮甲烷与酯1b在0°C时容易发生反应,得到[α,α-双(4-三氟甲基吡唑-3-基)]苯甲酸苄酯(16)和[α-(1-甲基-4-三氟甲基吡唑并5]