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[ CAS No. 1003-29-8 ] {[proInfo.proName]}

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Chemical Structure| 1003-29-8
Chemical Structure| 1003-29-8
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Product Citations

Product Citations

Berg, Kaja ; Hegde, Pooja ; Pujari, Venugopal , et al. DOI: PubMed ID:

Abstract: The electron transport chain (ETC) in the cell membrane consists of a series of redox complexes that transfer electrons from electron donors to acceptors and couples this electron transfer with the transfer of protons (H+) across a membrane. This process generates proton motive force which is used to produce ATP and a myriad of other functions and is essential for the long-term survival of Mycobacterium tuberculosis (Mtb), the causative organism of tuberculosis (TB), under the hypoxic conditions present within infected granulomas. Menaquinone (MK), an important carrier molecule within the mycobacterial ETC, is synthesized de novo by a cluster of enzymes known as the classic/canonical MK biosynthetic pathway. MenA (1,4-dihydroxy-2-naphthoate prenyltransferase), the antepenultimate enzyme in this pathway, is a verified target for TB therapy. In this study, we explored structure-activity relationships of a previously discovered MenA inhibitor scaffold, seeking to improve potency and drug disposition properties. Focusing our campaign upon three molecular regions, we identified two novel inhibitors with potent activity against MenA and Mtb (IC50 = 13-22 μM, GIC50 = 8-10 μM). These analogs also displayed substantially improved pharmacokinetic parameters and potent synergy with other ETC-targeting agents, achieving nearly complete sterilization of Mtb in combination therapy within two weeks in vivo. These new inhibitors of MK biosynthesis present a promising new strategy to curb the continued spread of TB.

Keywords: 1,4-dihydroxy-2-naphthoate prenyltransferase ; MenA ; MenA inhibitors ; Menaquinone ; Mtb ; Mycobacterium tuberculosis ; Piperidine derivatives ; SAR

Purchased from AmBeed: ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; 25952-53-8 ; ; ; ; ; ; 22246-18-0 ; ; ; ; ; ; ; ; ; ; ; ; ; ;

Product Details of [ 1003-29-8 ]

CAS No. :1003-29-8 MDL No. :MFCD00005217
Formula : C5H5NO Boiling Point : -
Linear Structure Formula :(C4H4N)CHO InChI Key :ZSKGQVFRTSEPJT-UHFFFAOYSA-N
M.W : 95.10 Pubchem ID :13854
Synonyms :
Chemical Name :1H-Pyrrole-2-carbaldehyde

Calculated chemistry of [ 1003-29-8 ]      Expand+

Physicochemical Properties

Num. heavy atoms : 7
Num. arom. heavy atoms : 5
Fraction Csp3 : 0.0
Num. rotatable bonds : 1
Num. H-bond acceptors : 1.0
Num. H-bond donors : 1.0
Molar Refractivity : 26.18
TPSA : 32.86 ?2

Pharmacokinetics

GI absorption : High
BBB permeant : Yes
P-gp substrate : No
CYP1A2 inhibitor : No
CYP2C19 inhibitor : No
CYP2C9 inhibitor : No
CYP2D6 inhibitor : No
CYP3A4 inhibitor : No
Log Kp (skin permeation) : -6.52 cm/s

Lipophilicity

Log Po/w (iLOGP) : 0.96
Log Po/w (XLOGP3) : 0.51
Log Po/w (WLOGP) : 0.83
Log Po/w (MLOGP) : -0.56
Log Po/w (SILICOS-IT) : 1.61
Consensus Log Po/w : 0.67

Druglikeness

Lipinski : 0.0
Ghose : None
Veber : 0.0
Egan : 0.0
Muegge : 1.0
Bioavailability Score : 0.55

Water Solubility

Log S (ESOL) : -1.21
Solubility : 5.82 mg/ml ; 0.0612 mol/l
Class : Very soluble
Log S (Ali) : -0.77
Solubility : 16.1 mg/ml ; 0.17 mol/l
Class : Very soluble
Log S (SILICOS-IT) : -1.47
Solubility : 3.24 mg/ml ; 0.034 mol/l
Class : Soluble

Medicinal Chemistry

PAINS : 0.0 alert
Brenk : 1.0 alert
Leadlikeness : 1.0
Synthetic accessibility : 1.0

Safety of [ 1003-29-8 ]

Signal Word:Warning Class:N/A
Precautionary Statements:P261-P305+P351+P338 UN#:N/A
Hazard Statements:H315-H319-H335 Packing Group:N/A
GHS Pictogram:

Application In Synthesis of [ 1003-29-8 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 1003-29-8 ]

[ 1003-29-8 ] Synthesis Path-Downstream   1~15

  • 1
  • [ 1003-29-8 ]
  • [ 58656-98-7 ]
  • 4-(2-Formyl-pyrrol-1-yl)-benzoic acid tert-butyl ester [ No CAS ]
  • 2
  • [ 1003-29-8 ]
  • [ 7089-68-1 ]
  • [ 1779-49-3 ]
  • [ 207505-40-6 ]
  • 3
  • [ 1003-29-8 ]
  • [ 766-36-9 ]
  • (Z)-5-((1H-pyrrol-2-yl)methylene)-3-ethyl-4-methyl-1H-pyrrol-2(5H)-one [ No CAS ]
  • 4
  • [ 1003-29-8 ]
  • [ 326-62-5 ]
  • (Z)-2-(2-fluorophenyl)-3-(1H-pyrrol-2-yl)acrylonitrile [ No CAS ]
  • 5
  • [ 1003-29-8 ]
  • [ 656-35-9 ]
  • 2-(2,4-difluoro-phenyl)-3-(1<i>H</i>-pyrrol-2-yl)-acrylonitrile [ No CAS ]
  • 6
  • [ 931-34-0 ]
  • [ 1003-29-8 ]
  • 7
  • [ 1003-29-8 ]
  • [ 99365-48-7 ]
  • [ 276251-73-1 ]
YieldReaction ConditionsOperation in experiment
96% With piperidine; In isopropyl alcohol; at 85℃; for 2h; A mixture of <strong>[99365-48-7]4-bromo-1,3-dihydro-2H-indol-2-one</strong> (0.2 g, 0.94 mmol) (see T. Kosuge et. al., Chem. Pharm. Bull. 33(4):1414-1418 (1985)), and excess pyrrole-2-carboxaldehyde (0.11 g, 1.13 mmol) (Aldrich) in 1% piperidine in 2-propanol (2 mL) was heated at 85 C for 2 h. Hot water (2 mL) was added. On cooling, the crystallized product was filtered off, washed with aqueous 2-propanol and dried. (Yield 0.26 g, 96%)
  • 8
  • [ 1003-29-8 ]
  • [ 20348-09-8 ]
  • [ 312973-06-1 ]
  • [ 312973-72-1 ]
YieldReaction ConditionsOperation in experiment
2%; 15% Sodium methoxide (0.65 g, 0.012 mol) was added in one portion to a mixture of 2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one (1.50 g, 0.01 mol) and pyrrole-2-carboxaldehyde (1.58 g, 0.016 mol) in dry DMF (10 ml). The reaction mixture was refluxed for 48 h, then cooled to room temperature, poured into crushed ice and left overnight at 4 C. The precipitated solid was filtered off, washed with water and dried. The dark solid was boiled with ethanol (150 ml) and filtered hot to remove impurities. The filtrate was evaporated to dryness under reduced pressure, and the residue was purified by silica gel chromatographed using (95:5) toluene:ethyl acetate as the mobile phase.
  • 9
  • [ 1003-29-8 ]
  • [ 942067-98-3 ]
  • [ 258827-90-6 ]
  • 11
  • [ 1003-29-8 ]
  • [ 1668-54-8 ]
  • [ 1465740-09-3 ]
  • 12
  • [ 1003-29-8 ]
  • [ 1120-95-2 ]
  • [ 1600527-79-4 ]
YieldReaction ConditionsOperation in experiment
34% With potassium carbonate; In N,N-dimethyl-formamide; at 100℃; for 20h; General procedure: A flask was charged with 2-formylpyrrole 1 (5.00 g, 52.6 mmol), K2CO3 (8.72 g, 63.1 mmol), 2-fluoropyridine 2 (9.0 mL, 105.2 mmol) and DMF (26 mL).The mixture was heated at 100 °C for 20 h and then cooled to rt. The reaction mixturewas diluted with water, extracted with MTBE, and the organic phase was dried (MgSO4), filtered, and concentrated. The crude product was purified by chromatography on SiO2(hexanes/EtOAc, 95:5 to 85:15 v/v) to give the product 3 (5.71 g, 63percent) as a tan solid.
  • 13
  • [ 1003-29-8 ]
  • [ 14704-31-5 ]
  • 1-([1,1'-biphenyl]-3-ylmethyl)-1H-pyrrole-2-carbaldehyde [ No CAS ]
YieldReaction ConditionsOperation in experiment
98% With tetrabutylammomium bromide; sodium hydroxide; In dichloromethane; water; at 0 - 20℃; To a stirred mixture of 1H-pyrrole-2-carbaldehyde 39 (200 mg, 2.10 mmol), TBAB (68 mg, 0.21 mmol) and <strong>[14704-31-5]3-(bromomethyl)-1,1'-biphenyl</strong> 38 (624 mg, 2.52 mmol ) in DCM was added aqueous NaOH solution (1.2 mL, 1.25 M in H2O) dropwise over a period of 30 min at 0 C. Then the mixture was allowed to warm to room temperature. After stirring overnight, the mixture was diluted with water, and extracted with DCM (3 x 30 mL). The combined organic phases were washed with 2 M HCl, saturated NaHCO3 and brine, dried with Na2SO4, filtered, concentrated and purified by silica gel chromatography to afford 43 (540 mg, 98%) as a white solid.
  • 14
  • [ 1003-29-8 ]
  • [ 78364-55-3 ]
  • 6-fluoro-2-[2-((1H-pyrrol-2-yl)methylene)hydrazino]benzothiazole [ No CAS ]
YieldReaction ConditionsOperation in experiment
79% With acetic acid; In ethanol; at 80℃; for 0.166667h;Microwave irradiation; General procedure: 2-(2-Arylidenehydrazino)-6-fluorobenzothiazoles 6a-r. General Procedure D. A mixture of compound 2 (0.0549 g, 0.0003 mol), the appropriate aromatic aldehyde (0.00033 mol) and glacial acetic acid (0.1 mL) in ethanol (5 mL) was heated under microwave (20 W) at 80 °C for 10 min. On cooling, the precipitated solid was collected by filtration, washed with water, dried and crystallized from the appropriate solvent to give the desired compounds 6a-r.
  • 15
  • [ 1003-29-8 ]
  • [ 53137-27-2 ]
  • [ 931-53-3 ]
  • [ 106-49-0 ]
  • N-(2-(cyclohexylamino)-2-oxo-1-(1H-pyrrol-2-yl)ethyl)-2,4-dimethyl-N-(p-tolyl)thiazole-5-carboxamide [ No CAS ]
YieldReaction ConditionsOperation in experiment
35% General procedure: The aldehyde (0.8 equivalent) and amine (0.7 equivalent) were dissolved in methanol (2.0 mL) and stirred for two to 3 h depending upon the starting material. The acid (100 mg, 1 equivalent) and isocyanide (0.7 equivalent) were added in the reaction mixture and further stirred. The reaction mixture was monitored using TLC analysis.Water (4 mL) was added upon completion of the reaction.The resulted solid was filtered off and dissolved in ethyl acetate(10 mL), washed with water (2 3 mL) and dried over sodium sulphate. The crude product was purified using silica gel column chromatography. The ethyl acetate:hexane (6:4) solvent system was used for the purification of these compounds.
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