1-Methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Name: 1-Methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid
Brand: ChemScene
Availability: InStock
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CAS No. 18471-99-3
Cat. No. CS-0038698
Purity≥98%
MDL No.None

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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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1-Methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid|CS-0038698

Structure of 18471-99-3

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Description

1-Methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid features a fused quinoline core with a methylated nitrogen and a carboxylic acid at C3, enabling direct integration into bioactive scaffolds. The electron-deficient dihydroquinoline ring facilitates conjugation in medicinal chemistry applications, while the bench-stable carboxylic acid group supports straightforward derivatization under standard conditions.

Application

1-Methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid serves as a versatile scaffold for medicinal chemistry and synthetic organic research. Its conjugated quinolinone core enables reliable functionalization at C3 and C4 positions, facilitating coupling reactions and derivatization under mild conditions. The carboxylic acid group supports direct amidation or esterification, while the methyl substituent enhances metabolic stability and modulates electronic properties. Bench-stable and readily purified by recrystallization, it functions as a key building block in the synthesis of heterocyclic APIs and bioactive molecules.

General Information

CAS No. 18471-99-3
Cat. No. CS-0038698
Purity ≥98%
MDL No. None
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₁₁H₉NO₃
Molecular Weight 203.19
Synonym(s) 1-methyl-4-oxoquinoline-3-carboxylic acid
SMILES CN1C=C(C(=O)C2=C1C=CC=C2)C(=O)O

Computational Chemistry Data

TPSA 59.3
LogP 1.2367
H_Acceptors 3
H_Donors 1
Rotatable_Bonds 1

Safety Information

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GHS Pictogram :	GHS No : GHS07
Signal Word : Warning	UN#: N/A
Class : N/A	Packing Group : N/A
Hazard Statements : H302-H315-H319-H335
Precautionary Statements : P261-P264-P270-P271-P280-P302+P352-P304+P340-P305+P351+P338-P330-P362+P364-P403+P233-P405-P501

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Other Classifications

Building Blocks Skeleton Aromatic heterocycle compounds Pyridine compounds

Key Words

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1-Methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

CAS No. 18471-99-3

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