1-Ethylpyrazole-4-sulfonyl chloride

Name: 1-Ethylpyrazole-4-sulfonyl chloride
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CAS No. 957514-21-5
Cat. No. CS-0061518
Purity≥95%
MDL No.None

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1-Ethylpyrazole-4-sulfonyl chloride|CS-0061518

Structure of 957514-21-5

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General Information

CAS No. 957514-21-5
Cat. No. CS-0061518
Purity ≥95%
MDL No. None
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₅H₇ClN₂O₂S
Molecular Weight 194.64
Synonym(s) None
SMILES CCN1C=C(C=N1)S(=O)(=O)Cl

Description

1-Ethyl-1H-pyrazole-4-sulfonyl chloride features a reactive sulfonyl chloride group tethered to a pyrazole scaffold, enabling efficient coupling in heterocyclic synthesis. The ethyl substituent enhances solubility and modulates electronic properties, while the bench-stable nature facilitates handling under standard conditions. This reagent integrates readily into pharmaceutical and agrochemical development workflows.

Application

1-Ethyl-1H-pyrazole-4-sulfonyl chloride serves as a versatile sulfonyl chloride building block for the synthesis of sulfonamide derivatives. Its pyrazole scaffold provides structural rigidity and enhanced metabolic stability, while the reactive sulfonyl chloride group enables efficient coupling with amines under mild conditions. The ethyl substituent enhances solubility and facilitates purification. This reagent is bench-stable, compatible with common functional groups, and widely used in medicinal chemistry for constructing bioactive heterocyclic scaffolds.

Safety Information

Download SDS

GHS Pictogram :	GHS No : GHS05
Signal Word : Danger	UN#: 3265
Class : 8	Packing Group : Ⅲ
Hazard Statements : H314
Precautionary Statements : P260-P264-P280-P301+P330+P331-P304+P340-P363-P405-P501

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Computational Chemistry Data

TPSA 51.96
LogP 0.8305
H_Acceptors 4
H_Donors 0
Rotatable_Bonds 2

Other Classifications

Building Blocks Skeleton Aromatic heterocycle compounds Pyrazole compounds

Key Words

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1-Ethylpyrazole-4-sulfonyl chloride

CAS No. 957514-21-5

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