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Synthesis of the PFP derivatives 15, 16, 17 and 18 from the corresponding TCOs 7, 8, 13 and 14 with DPFPC (2.75 equiv) and DIPEA (3.0 equiv) in dichloromethane, at room temperature for 18 h. The endo‐derivatives were obtained as an inseparable mixture of the axial (17) and equatorial (18) diastereoisomers in a 1 : 2.5 ratio respectively. PFP=pentafluorophenyl.
