Antihydroxolin

Antihydroxolin

Author – Sukhachov Denys Pavlovich

This is a work, and the author’s right to a work under international law comes into force from the moment the work is created.

Here is the chemical structure of the modified sulfonamide with added -OH groups at the ortho, meta, and para positions of the benzene ring.

Chemical properties and potential activity as an antibiotic

1. Increased solubility in water
   • Hydroxyl (-OH) groups make the molecule more polar, which can improve its solubility and bioavailability.
   • This may contribute to better penetration into the body’s aqueous media (e.g., urinary tract).
2. Changing the mechanism of action
   • OH-groups can interact with the active site of dihydropteroate synthase (an enzyme involved in the synthesis of folic acid in bacteria), changing its inhibition.
   • This can make the antibiotic stronger or weaker, depending on the spatial interaction with the enzyme.
3. Potential impact on bacteria
   • The addition of OH groups can change the spectrum of activity – perhaps the antibiotic will become effective against new strains of bacteria, including those that develop resistance to classical sulfonamides.
   • Antioxidant activity may appear, potentially protecting against bacterial toxins.
4. Changes in pharmacokinetics
   • Due to additional hydroxyl groups, the rate of drug metabolism in the liver may change.
   • Such changes can either lengthen or shorten the time of the drug’s action in the body.

Possible application in medicine

• Treatment of resistant infections (e.g., bacteria resistant to conventional sulfonamides).
• Urinary tract infections (due to improved solubility).
• Combination therapy with other antibiotics to reduce the risk of resistance.

If you are interested in conducting a deeper analysis, we can do a computer simulation of this molecule or find similar studies. What do you think?

4o

You said:

Now develop a synthesis mechanism and describe it

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Here is the mechanism of synthesis of modified sulfonamide with hydroxyl (-OH) groups at the ortho, meta, and para positions of the benzene ring.

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General synthetic route

Synthesis consists of several main stages:

1. Hydroxylation of the benzene ring
2. Sulfonation (introduction of -SO₂NH₂)
3. Amidation (introduction of -NH₂)
4. Cleaning and isolation of the final product

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1. Hydroxylation of benzene (Preparation of polyhydroxybenzene)

To introduce -OH groups into the benzene ring, a catalyzed hydroxylation reaction of benzene is used.

🔹 Reaction (Hydroxylation of benzene):

C6H6+3H2O2→C6H3(OH)3+3H2OC_6H_6 + 3H_2O_2 → C_6H_3(OH)_3 + 3H_2OC6H6+3H2O2→C6H3(OH)3+3H2O

Catalyst: ferric (III) chloride (FeCl₃)

This process yields pyrogallol (1,2,3-trihydroxybenzene), which contains -OH groups at the ortho, meta, and para positions.

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2. Sulfonation (Introduction of -SO₂Cl group)

The next step is the introduction of a sulfochloride (-SO₂Cl) group by reaction with chlorosulfonic acid.

🔹 Reaction (Sulfochlorination):

C6H3(OH)3+ClSO2OH→C6H3(OH)3SO2Cl+HClC_6H_3(OH)_3 + ClSO_2OH → C_6H_3(OH)_3SO_2Cl + HClC6H3(OH)3+ClSO2OH→C6H3(OH)3SO2Cl+HCl

The reaction is carried out in an anhydrous medium (CH₂Cl₂, 0°C).

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3. Amidation (Preparation of sulfonamide – introduction of -SO₂NH₂)

Next, amidation is carried out by reacting the sulfochloride with ammonia (NH₃) to obtain a sulfonamide (-SO₂NH₂) group.

🔹 Reaction (Amidation):

C6H3(OH)3SO2Cl+2NH3→C6H3(OH)3SO2NH2+NH4ClC_6H_3(OH)_3SO_2Cl + 2NH_3 → C_6H_3(OH)_3SO_2NH_2 + NH_4ClC6H3(OH)3SO2Cl+2NH3→C6H3(OH)3SO2NH2+NH4Cl

The reaction takes place at a low temperature (~0-5°C) because sulfochloride is highly reactive.

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4. Amidation (introduction of the -NH₂ amino group into the para-position)

The last step is amidation to introduce a para-amino group (-NH₂). This is achieved by nitration followed by reduction.

🔹 Reaction (Nitration):

C6H3(OH)3SO2NH2+HNO3→C6H2(OH)3SO2NH2NO2C_6H_3(OH)_3SO_2NH_2 + HNO_3 → C_6H_2(OH)_3SO_2NH_2NO_2C6​H3​(OH)3​SO2​NH2​+HNO3​→C6​H2​(OH)3​SO2​NH2​NO2​

🔹 Reaction (Recovery):

C6H2(OH)3SO2NH2NO2+H2→C6H2(OH)3SO2NH2NH2C_6H_2(OH)_3SO_2NH_2NO_2 + H_2 → C_6H_2(OH)_3SO_2NH_2NH_2C6​H2​(OH)3​SO2​NH2​NO2​+H2​→C6​H2​(OH)3​SO2​NH2​NH2​

(catalyst: Pt/C or Fe/HCl)

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The final product

The resulting product is a modified sulfonamide with OH groups in the ortho, meta, and para positions.

This modification can improve solubility, antibacterial activity and make the drug more effective against resistant bacteria.