“…mixture was diluted with H 2 O (50mL) and extracted with CH 2 Cl 2 (2×50mL). The combined organic layers were washed with H 2 O 7 ), 143.0(s,C 13 ), 130.9(dd, 2 J(C 4a ,F 5 )=11.9Hz, C 4a ), 120.7(dd, 2 J(C 8a ,F 8 )=13.0Hz, C 8a ), 110.7(s,C 12 ), 109.6(ddm, 2 J(C 6 ,F 7 )=27.1Hz, 2 J(C 6 ,F 5 )=21.8Hz, C 6 ), 109.5(s, C 11 ), 50.4(d, J(C 9 ,F 5 )=11.4Hz, C 9 ), 49.3(s,C 2 ), 47.3(s,C 3 ) 19. F NMR (282MHz, CDCl 3 ): δ=-120.8(t, J(F 5 ,F 8 )≈J(F 5 ,H 6 )=12.8Hz, 1F, F 5 ), -141.3 (m, J(F 8 ,F 7 )=22.6Hz,J(F 8 ,F 5 )=13.5Hz, J(F 8 ,H 6 )=7.3Hz,1F,F 5 ), -142.7(ddm, J(F 7 ,F 8 )=22.6Hz, J(F 7 ,H 6 )=9.5Hz, 1F, F 7 ).…”