1.1
Reagents:
ε-Caprolactone
Catalysts:
Dibutyltin dimethoxide
(reaction product with ethoxylated pentaerythritol and γ-thiobutyrolact…)
Solvents:
Chlorobenzene
;
10 min, rt; 2 h, 60 °C
1.2
Solvents:
Toluene
;
6 h, 60 °C