From: Butadiene sulfone as ‘volatile’, recyclable dipolar, aprotic solvent for conducting substitution and cycloaddition reactions
Entry
Solvent
Temp (°C)
Time (days)
Yield (%)
Conv. 1 (%)
Conv. 2 (%)
1
DMSO
50
4
30 ± 1
100 ± 0
47 ± 1
2
BS
70
70 ± 2
99.2 ± 0.1
89 ± 1
3
50 ± 1
57 ± 2
51 ± 2
77 ± 1
95 ± 1
91 ± 4
5
50–60
4a
82 ± 2b
99 ± 1
93 ± 2