4,5-Dichloropyridazine-3,6-diol

Name: 4,5-Dichloropyridazine-3,6-diol
Brand: ChemScene
Availability: InStock
Rating: 5 (1 reviews)

CAS No. 6641-32-3
Cat. No. CS-0157953
Purity≥95%
MDL No.MFCD00834958

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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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4,5-Dichloropyridazine-3,6-diol|CS-0157953

Structure of 6641-32-3

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General Information

CAS No. 6641-32-3
Cat. No. CS-0157953
Purity ≥95%
MDL No. MFCD00834958
Storage -20°C, stored under nitrogen, away from moisture
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₄H₂Cl₂N₂O₂
Molecular Weight 180.98
Synonym(s) 4,5-DICHLORO-3,6-PYRIDAZINEDIOL
SMILES C1(=C(C(=NN=C1O)O)Cl)Cl

Description

4,5-Dichloropyridazine-3,6-diol features a rigid heteroaromatic core with two chlorine substituents at the 4 and 5 positions, flanking hydroxyl groups at the 3 and 6 positions. This arrangement enables direct functionalization in late-stage diversification, particularly in medicinal chemistry applications where halogenation supports cross-coupling reactions. The molecule exhibits enhanced solubility and stability under standard conditions, facilitating use in synthetic workflows requiring precise control over reactivity.

Application

4,5-Dichloropyridazine-3,6-diol serves as a versatile building block in medicinal chemistry, enabling efficient construction of heterocyclic scaffolds through nucleophilic substitution. Its dichloro functionality provides orthogonal reactivity for sequential functionalization, while the diol groups enhance solubility and facilitate purification. The compound exhibits good bench stability and functions effectively in standard coupling protocols, supporting scalable synthesis of complex molecules.

Synthesis

Route1
- In-stock
  
  1122-17-4
- ~88%
- In-stock
  
  6641-32-3
References
- Ewing, William R.; Zhu, Yeheng; Ellsworth, Bruce A. Patent: US2006/287323 A1, 2006 ; Location in patent: Page/Page column 7 ; US 20060287323 A1

Safety Information

Download SDS

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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Computational Chemistry Data

TPSA 66.24
LogP 1.1946
H_Acceptors 4
H_Donors 2
Rotatable_Bonds 0

Other Classifications

Building Blocks Functional Group Chloride

Building Blocks Skeleton Aromatic heterocycle compounds Pyridazine compounds

Key Words

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4,5-Dichloropyridazine-3,6-diol

CAS No. 6641-32-3

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