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Ophthalmic compositions for treating ocular hypertension

a technology of ocular hypertension and compositions, applied in the field of ophthalmic compositions for treating ocular hypertension, can solve the problems of unsatisfactory side effects, unsatisfactory efficacy and unsatisfactory side effects of these agents, and irreversible loss of visual function

Inactive Publication Date: 2008-11-20
MERCK SHARP & DOHME CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, damage may occur to the optic nerve head and result in irreversible loss of visual function.
If untreated, glaucoma may eventually lead to blindness.
There are several therapies for treating glaucoma and elevated intraocular pressure, but the efficacy and the side effect profiles of these agents are not ideal.

Method used

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  • Ophthalmic compositions for treating ocular hypertension
  • Ophthalmic compositions for treating ocular hypertension
  • Ophthalmic compositions for treating ocular hypertension

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0140]

N,N-Bibutyl-2-[2-(2,2-dimethylpropanoyl)-5-methoxy-1-benzofuran-3-yl]acetamide

Step A: 1-(5-Methoxy-3-methyl-1-benzofuran-2-yl)-2,2-dimethylpropan-1-one

[0141]DMF (4 mL) was added to a mixture of 166 mg 1-(2-hydroxy-5-methoxyphenyl)ethanone and 370 mg cesium carbonate followed by 188 mg 1-bromopinacolone. After heating this mixture in an 85° C. oil bath for 3 hours, it was poured into cold water and extracted with ether. The combined ether extract was washed with water, 1.5 N NaOH, water, and saturated brine, dried over anhydrous Na2SO4, and concentrated under reduced pressure to give a crude product. It was purified on silica gel (9:1 hexanes and EtOAc) to give the title compound as a colorless solid. 1H NMR (CDCl3, 500 MHz) δ 7.41 (d, J=9.0 Hz, 1H), 7.11 (dd, J=2.5 & 9.0 Hz, 1H), 7.04 (d, J=2.5 Hz, 1H), 3.90 (s, 3H), 2.59 (s, 3H), 1.43 (s, 9H).

Step B: [2-(2,2-Dimethylpropanoyl)-5-methoxy-1-benzofuran-3-yl]acetic acid

[0142]To a solution of 1.23 g 1-(5-methoxy-3-methyl-1-benzofu...

example 2

[0144]

2-[2-(2,2-Dimethylpropanoyl)-5-methoxy-1-benzofuran-3-yl]-N,N-diisobutylacetamide

[0145]Dissolve a mixture of 17 mg [2-(2,2-dimethylpropanoyl)-5-methoxy-1-benzofuran-3-yl]acetic acid from the Step B Example 1 and 18.5 mg HOBt in 1 mL dry DMF. Add 15.4 μL di-1-butylamine followed by 23.0 mg EDC and 35 μL DIEA. This solution was heated at 40° C. for 2 hours. It was purified directly on RP-HPLC using 65-100% MeCN gradient. The fractions containing pure product were pooled and lyophilized to give the title compound. LC-MS: 4.42 min. (m / Z=318.2, 402.2, 424.2).

example 3

[0146]

N-(Cyclopropylmethyl)-2-[2-(2,2-dimethylpropanoyl)-5-methoxy-1-benzofuran-3-yl]-N-propylacetamide

[0147]Dissolve a mixture of 17 mg [2-(2,2-dimethylpropanoyl)-5-methoxy-1-benzofuran-3-yl]acetic acid from the Step B Example 1 and 18.5 mg HOBt in 1 mL dry DMF. Add 12.6 μL N-propylcyclopropanemethylamine followed by 23.0 mg EDC and 35 μL DIEA. This solution was heated at 40° C. for 2 hours. It was purified directly on RP-HPLC using 60-100% MeCN gradient. The fractions containing pure product were pooled and lyophilized to give the title compound. LC-MS: 4.17 min. (m / Z=386.2, 302.1, 408.1).

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Abstract

This invention relates to potent potassium channel blocker compounds of Formula I or a formulation thereof for the treatment of glaucoma and other conditions which leads to elevated intraocular pressure in the eye of a patient. This invention also relates to the use of such compounds to provide a neuroprotective effect to the eye of mammalian species, particularly humans.

Description

[0001]This application claims the benefit under 35 U.S.C. 119(e) of U.S. Provisional Application No. 60 / 499,628 filed Sep. 2, 2003.BACKGROUND OF THE INVENTION[0002]Glaucoma is a degenerative disease of the eye wherein the intraocular pressure is too high to permit normal eye function. As a result, damage may occur to the optic nerve head and result in irreversible loss of visual function. If untreated, glaucoma may eventually lead to blindness. Ocular hypertension, i.e., the condition of elevated intraocular pressure without optic nerve head damage or characteristic glaucomatous visual field defects, is now believed by the majority of ophthalmologists to represent merely the earliest phase in the onset of glaucoma.[0003]There are several therapies for treating glaucoma and elevated intraocular pressure, but the efficacy and the side effect profiles of these agents are not ideal. Recently potassium channel blockers were found to reduce intraocular pressure in the eye and therefore pr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K31/472A61K31/352C07D307/81C07D217/18A61P27/00A61K31/381C07D333/60A61KA61K31/34C07D307/78
CPCC07D307/80C07D307/81C07D333/56C07D333/60C07D405/06A61P25/02A61P25/24A61P25/28A61P27/00A61P27/02A61P27/06A61P43/00A61P9/06A61P9/12A61P3/10
Inventor SHEN, DONG-MINGDOHERTY, JAMES B.
Owner MERCK SHARP & DOHME CORP
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