An object of the present invention is to provide a production method of an intermediate used
in the production method of a Sulfonylpyrrole compound useful as a pharmaceutical product.
The present invention relates to a method of pro ducing Sulfonylpyrrole compound (VI) by
reacting a pyri dine-3-sulfonic acid compound with phosphorus pentachlo ride in a solvent of
chlorobenzene or trifluoromethylbenzene to give a pyridine-3-sulfonyl chloride compound,
reacting the compound without isolation with compound (III) to give compound (IV), and …

TECHNICAL FIELD The present invention relates to a production method of a wherein r'is a
monocyclic nitrogen-containing heterocyclic sulfonyl chloride compound used in a
production method of group optionally fused with a benzene ring or heterocycle, a pyrrole
compound useful as a pharmaceutical product, 15 and optionally having substituent (s);
particularly an acid secretion inhibitor, and the like. r is an optionally substituted C6-14 aryl
group, an optionally BACKGROUND OF THE INVENTION substituted thienyl group or an …