Advanced substrates for direct chloriranium-induced terpene cyclization^a.

Entry	Substrate	Product	Yieldb (d.r.)
1			25% (>95 : 5)
2			51% (73 : 27)
3c			40% (>95 : 5)

^aSubstrate (0.20 mmol, 1.0 eq.) was added to 76.8 mg reagent 21 (0.24 mmol, 1.2 eq.) and 7.33 mg saccharin 22 (40 μmol, 0.2 eq.) in 2.00 mL HFIP at 0 °C.

^bIsolated yield.

^c2.4 eq. reagent 21 was used. The d.r. was determined by ¹H-NMR spectroscopy of the crude reaction mixture. The given d.r. refers to the configuration at the carbon(s) highlighted in grey.