Pyridine sulfur trioxide synthesis
- Product Name:Pyridine sulfur trioxide
- CAS Number:26412-87-3
- Molecular formula:C5H5NO3S
- Molecular Weight:159.16
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Yield:-
Reaction Conditions:
with chlorosulfonic acid in dichloromethane at 0; for 0.5 h;Inert atmosphere;
Steps:
Procedure for synthesis of SO .Py
[0302] To a solution of pyridine (4 mL) in DCM (20 mL) at 0C, chlorosulfonic acid (1.6 mL) was added dropwise and the mixture stirred for 30 min. The reaction mixture was then filtered and the precipitate was washed with ice cold water (3 × 20 mL), ice cold sat. NaHCO (2 × 10 mL), ice cold water (2 × 10 mL) (till the pH of the filtrate was 7), cold 3 (0551) EtOH (2 × 20 mL), cold toluene (10 mL) and cold DCM (10 mL). The precipitated SO .Py (0552) 3 was then thoroughly dried under high vacuum and used within 24 h.
References:
WO2018/68090,2018,A1 Location in patent:Paragraph 0187; 0302
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