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BioAssay: AID 677049

Dissociation constant, pKa of the compound

Oxadiazoles are five-membered heteroaromatic rings containing two carbons, two nitrogens, and one oxygen atom, and they exist in different regioisomeric forms. Oxadiazoles are frequently occurring motifs in druglike molecules, and they are often used with the intention of being bioisosteric replacements for ester and amide functionalities. The current study presents a systematic comparison of more ..
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 Tested Compounds
 Tested Compounds
All(14)
 
 
Unspecified(14)
 
 
 Tested Substances
 Tested Substances
All(14)
 
 
Unspecified(14)
 
 
 Related BioAssays
 Related BioAssays
AID: 677049
Data Source: ChEMBL (834188)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2013-05-16
Modify Date: 2014-05-27

Data Table ( Complete ):           All
Tested Compounds:
Description:
Title: Oxadiazoles in medicinal chemistry.

Abstract: Oxadiazoles are five-membered heteroaromatic rings containing two carbons, two nitrogens, and one oxygen atom, and they exist in different regioisomeric forms. Oxadiazoles are frequently occurring motifs in druglike molecules, and they are often used with the intention of being bioisosteric replacements for ester and amide functionalities. The current study presents a systematic comparison of 1,2,4- and 1,3,4-oxadiazole matched pairs in the AstraZeneca compound collection. In virtually all cases, the 1,3,4-oxadiazole isomer shows an order of magnitude lower lipophilicity (log D), as compared to its isomeric partner. Significant differences are also observed with respect to metabolic stability, hERG inhibition, and aqueous solubility, favoring the 1,3,4-oxadiazole isomers. The difference in profile between the 1,2,4 and 1,3,4 regioisomers can be rationalized by their intrinsically different charge distributions (e.g., dipole moments). To facilitate the use of these heteroaromatic rings, novel synthetic routes for ready access of a broad spectrum of 1,3,4-oxadiazoles, under mild conditions, are described.
(PMID: 22185670)
Comment
Putative Target:

ChEMBL Target ID: 22229
Target Type: NO TARGET
Pref Name: No relevant target
Confidence: Default value - Target unknown or has yet to be assigned
Relationship Type: Default value - Target has yet to be curated
Categorized Comment
Assay Type: Physicochemical

Assay Data Source: Scientific Literature

BAO: Assay Format: small-molecule physicochemical format

Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1pKa activity commentpKa activity commentString
2pKa standard flagpKa standard flagInteger
3pKa qualifierpKa qualifierString
4pKa published valuepKa published valueFloat
5pKa standard valuepKa standard valueFloat

Data Table (Concise)
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