4,5-Dichlorothieno[2,3-d]pyrimidine

Name: 4,5-Dichlorothieno[2,3-d]pyrimidine
Brand: ChemScene
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CAS No. 137240-10-9
Cat. No. CS-0157342
Purity≥95%
MDL No.MFCD13193401

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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-Dichlorothieno[2,3-d]pyrimidine|CS-0157342

Structure of 137240-10-9

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General Information

CAS No. 137240-10-9
Cat. No. CS-0157342
Purity ≥95%
MDL No. MFCD13193401
Storage -20°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₆H₂Cl₂N₂S
Molecular Weight 205.06
Synonym(s) None
SMILES C1=C(C2=C(Cl)N=CN=C2S1)Cl

Description

4,5-Dichlorothieno[2,3-d]pyrimidine features a fused thienopyrimidine core with two chlorine substituents at the 4 and 5 positions, conferring enhanced electron-withdrawing character and improved metabolic stability. This scaffold serves as a critical building block in medicinal chemistry, particularly for kinase inhibitors and antiviral agents. The dichloro substitution pattern enables selective coupling reactions under standard conditions, facilitating rapid diversification in lead optimization campaigns.

Application

4,5-Dichlorothieno[2,3-d]pyrimidine serves as a versatile building block in heterocyclic synthesis, enabling efficient access to thienopyrimidine scaffolds prevalent in medicinal chemistry. The dichloro substitution pattern facilitates palladium-catalyzed cross-coupling reactions and nucleophilic aromatic substitution, offering predictable regioselectivity. Its bench-stable nature and compatibility with diverse functional groups make it a practical reagent for constructing complex molecular architectures in API development and target-oriented synthesis.

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-H332-H335
Precautionary Statements : P261-P264-P270-P271-P280-P302+P352-P304+P340-P330-P362+P364-P405-P501

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Computational Chemistry Data

TPSA 25.78
LogP 2.9981
H_Acceptors 3
H_Donors 0
Rotatable_Bonds 0

Other Classifications

Building Blocks Skeleton Aromatic heterocycle compounds Pyrimidine compounds

Building Blocks Skeleton Aromatic heterocycle compounds Thiophene compounds

Key Words

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4,5-Dichlorothieno[2,3-d]pyrimidine

CAS No. 137240-10-9

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