Table 1.

Influence of the amount of DABCO on the conversion of diazonium salt 2 a and the yield of sulfonimidate 3 a.^[a]

Entry	DABCO [equiv]	Conversion of 2 a [%][b]	Yield of 3 a [%][b]
1	0	22	20
2	1.10	>95	60
3	0.55	88	43
4	0.10	26	15
5[c]	0.10	23	17
6[d]	0.55	>95	0

[a] Performed at room temperature for 20 min. [b] Determined by ¹⁹F qNMR with 3,3′‐bis(trifluoromethyl)benzophenone as internal standard. [c] Use of CaCO₃ (1.10 equiv) in addition to DABCO. [d] Performed at 60 °C. DABCO=1,4‐diazabicyclo[2.2.2]octane, THF=tetrahydrofuran.