Table 2.

Effect of [1.1.1]propellane (1) equivalents relative to CF₃SF₄Cl on selectivity.^a

entry	1 (equiv)	5 (% yield)b	3 (% yield)b	5:3
1	1.0	80%	10%	7.7:1.0
2	2.0	71%	21%	3.4:1.0
3	3.0	65%	31%	2.1:1.0
4	4.0	55%	40%	1.4:1.0
5	6.0	49%	40%	1.2:1.0
6	8.0	39%	46%	1.0:1.2
7	10	33%	62%	1.0:1.9
8	20	31%	65%	1.0:2.1
9 c	6.0	35%	60% (53%) d	1.0:1.7

^aA 0.1 M solution of CF₃SF₄Cl in n-pentane (0.03 mmol) was added to a 0.8 M solution of [1.1.1]propellane in Et₂O under Ar atmosphere and stirred at rt for 3 h. ^bYield determined by ¹⁹F NMR. ^cCF₃SF₄Cl was added portion-wise. ^dIsolated yield.