Novel cycloadducts from the reactions of [α,α-bis(3,3,3-trifluoropropynyl)]benzyl benzoate and [1,1-bis(3,3,3-trifluoropropynyl)]ethyl ethanoate with furan
作者:Michael G. Barlow、Sabiha Tajammal、Anthony E. Tipping
DOI:10.1039/c39890001637
日期:——
Reaction of furan with the dialknyl ester (CF3CC)2CPhOCOPh (1a) in dichloromethane at 50°C affords a mixture of four 1:1 adducts, the (Z)-isomer of triene (4a)(major product), diketone (5a), and the benzopenta-cyclononenes (3) and (6), via the common intermediate 2-benzoyloxy-2-phenyl-4, 10-bis(trifluoromethyl)-7-oxapentacyclo [4.4.0.01,3.05,9.08,10]dec-3-ene (9) formed from the bis Diels–Alder adduct
呋喃与二烷基酯(CF 3 C C)2 CPhOCOPh(1a)在二氯甲烷中于50°C反应,得到四种1:1的加合物的混合物,即三烯的(Z)异构体(4a)(主要产物),二酮(5a),和苯并五环-环壬烯(3)和(6),通过共同的中间体2-苯甲酰氧基-2-苯基-4,10-双(三氟甲基)-7-氧杂五环[4.4.0.0 1,3。 0 5,9 0.0 8,10 ]癸-3-烯(9从所形成的二基)双分子内狄尔斯-阿德耳加成物(π 2小号+ π2小号+ π 2个小号)环加成,随后的呋喃复古裂解; 与酯(CF 3 C C)2 CMeOCOMe(1b)的相应反应类似地产生二酮(5b)(主要产物)和三烯(4)的(E)和(Z)异构体的混合物,呋喃-二炔2:1加合物(7)或(8)也正在形成。