Fluorinated acetylenes. Part 12. Reaction of 3,3,3-trifluoropropynyl-lithium with benzil and α-haloacetophenones
作者:Michael G. Barlow、Sabiha Tajammal、Anthony E. Tipping
DOI:10.1016/s0022-1139(00)80404-2
日期:1993.7
3-trifluoropropynyl)oxirane (16) (25%) and the dialkynyl ester (1b) (7%). The oxirane 16, conveniently prepared (51%) by treatment of salt 4 with the bromoketone (1:1 molar ratio) in THF at −60 °C, on reaction with lithium phenylacetylide followed by addition of benzoyl chloride (c. 1:1:1 molar ratio) in THF at −60 °C gives a compound identified as 2-phenyl-2-(1-phenyl-5,5,5-trifluoropent-3-en-1-yn-3-yl)oxirane (17)
在-50°C下用乙醚中的苯甲腈(摩尔比为2:1)处理3,3,3-三氟丙炔基锂(4),然后加入过量的苯甲酰氯,得到1-苯甲酰基-5-苯甲酰氧基-5-苯基2,3-双(三氟甲基)环戊-1,3-二烯(11)(61%)和1,4- dialkynyl酯(CF 3 CC)2 CPHO 2 CPh的(1B)( 8%)。该盐的类似反应4与α氯苯乙酮(2:1摩尔比)中在-50℃下二乙醚,接着加入稍过量的苯甲酰氯的,给人的酯CF 3 CCPh(CH 2 Cl)的Ô 2 CPh(14a(55%)和被认为是2,5-二苯基-2,5-双(3,3,3-三氟丙炔基)-1,4-二恶烷的化合物(15)(30%)。在相同条件下,α-溴苯乙酮,得到相应的溴代酯CF 3 CCCPh(CH 2溴)O 2 CPh的(14B)(39%),2-苯基-2-(3,3,3- trifluoropropynyl)环氧乙烷(16)(25%)和二