Title:
PYRIDINE-3-SULFONYL CHLORIDE PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2016/204096
Kind Code:
A1
Abstract:
Provided is a pyridine-3-sulfonyl chloride production method which can be applied to industrial processes readily, undergoes the production of a byproduct in a reduced amount, and makes it possible to produce pyridine-3-sulfonyl chloride with higher yield compared with the conventional methods. A pyridine-3-sulfonyl chloride production method comprising the steps of: adding phosphorus pentachloride to a reaction solution containing pyridine-3-sulfonic acid in an amount of less than 1 molar equivalent relative to the amount of pyridine-3-sulfonic acid in multiple divided portions (i) stepwise or (ii) continuously, thereby causing the sequential reaction of pyridine-3-sulfonic acid with phosphorus pentachloride to produce pyridine-3-sulfonyl chloride; and subjecting the reaction solution to distillation under a reduced pressure to purify pyridine-3-sulfonyl chloride.
Inventors:
NOBESHIMA HIROBUMI (JP)
KOBAYASHI HITOSHI (JP)
KOBAYASHI HITOSHI (JP)
Application Number:
PCT/JP2016/067433
Publication Date:
December 22, 2016
Filing Date:
June 10, 2016
Export Citation:
Assignee:
TAMA KAGAKU KOGYO CO LTD (JP)
International Classes:
C07D213/71
Domestic Patent References:
| WO2014133059A1 | 2014-09-04 | |||
| WO2013047162A1 | 2013-04-04 |
Foreign References:
| JP2005529148A | 2005-09-29 | |||
| JP2002527359A | 2002-08-27 |
Attorney, Agent or Firm:
KONDO Rieko et al. (JP)
Kondo Toshihide child (JP)
Kondo Toshihide child (JP)
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