1H-Pyrazole-4-sulfonyl chloride

Name: 1H-Pyrazole-4-sulfonyl chloride
Brand: ChemScene
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CAS No. 438630-64-9
Cat. No. CS-0135587
Purity≥97%
MDL No.MFCD09701481

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Type	HazMat Fee
Excepted Quantity	$0.00
FedEx Limited Quantities Ground	$0.00
Hazmat Ground shipping	$50.00+
Inaccessible (Haz class 6.1 or 9), Domestic	$68.00+
Accessible (Haz class 3, 4, 5 or 8), Domestic	$158.00+
Inaccessible (Haz class 6.1 or 9), International	$108.00+
Accessible (Haz class 3, 4, 5 or 8), International	$238.00+

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1H-Pyrazole-4-sulfonyl chloride|CS-0135587

Structure of 438630-64-9

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Description

1H-Pyrazole-4-sulfonyl chloride features a reactive sulfonyl chloride group appended to a heteroaromatic pyrazole scaffold, enabling direct incorporation into sulfonamide derivatives. This bench-stable reagent facilitates efficient coupling under mild conditions, offering high functional group tolerance for applications in medicinal chemistry and materials synthesis.

Application

1H-Pyrazole-4-sulfonyl chloride serves as a versatile acylating agent for the introduction of pyrazolylsulfonyl groups into organic frameworks. It facilitates efficient sulfonamide formation under mild conditions and exhibits good bench stability, enabling straightforward purification and compatibility with diverse functional groups. This reagent functions reliably in the synthesis of heterocyclic scaffolds and bioactive molecules, particularly in medicinal chemistry workflows requiring orthogonal functionalization.

General Information

CAS No. 438630-64-9
Cat. No. CS-0135587
Purity ≥97%
MDL No. MFCD09701481
Storage 4°C, sealed storage, away from moisture and light
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₃H₃ClN₂O₂S
Molecular Weight 166.59
Synonym(s) 4-Chlorosulfonylpyrazole
SMILES O=S(C1=CNN=C1)(Cl)=O

Computational Chemistry Data

TPSA 62.82
LogP 0.3372
H_Acceptors 3
H_Donors 1
Rotatable_Bonds 1

Safety Information

Download SDS

GHS Pictogram :	GHS No : GHS05
Signal Word : Danger	UN#: 3261
Class : 8	Packing Group : Ⅲ
Hazard Statements : H314
Precautionary Statements : P260-P264-P280-P301+P330+P331-P304+P340-P363-P405-P501

Quality Control

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Other Classifications

Building Blocks Skeleton Aromatic heterocycle compounds Pyrazole compounds

Key Words

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1H-Pyrazole-4-sulfonyl chloride

CAS No. 438630-64-9

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