Spiro-hydantoin compounds useful as anti-inflammatory agents

Abstract

Compounds having the formula (I), and pharmaceutically-acceptable salts, hydrates, enantiomers, and diastereomers, and prodrugs thereof, are useful as inhibitors of LFA-1 / ICAM and as anti-inflammatory agents, wherein L and K are O or S; Z is N or CR4b; Ar is an optionally-substituted aryl or heteroaryl; G is a linker attached to T or M or is absent; J, M and T are selected to define a three to six membered saturated or partially unsaturated non-aromatic ring; and R2, R4a, R4b, and R4c are as defined in the specification.

Description

FIELD OF THE INVENTION The present invention relates to spiro-hydantoin compounds, pharmaceutical compositions containing them, and methods of using such compounds in treating inflammatory or immune disease. BACKGROUND OF THE INVENTION Cells adhere to other cells and to substrates through specific, regulated processes that are critical to various biological functions. The proper functioning of the immune system is dependent upon adhesive interactions and cell migration. A key event in an immune response involves the migration of leukocytes to a disease site. During an inflammatory response, leukocytes are recruited to the site of injury and extravasated by a series of cellular interactions involving cell-cell and cell-substrate adhesion. One family of molecules that serves an important adhesive function is integrins. Integrins are expressed on cell surfaces and function in cell-cell and cell-substrate adhesion. Integrins are alpha-beta heterodimers: each integrin has an alpha (α)...

AI Technical Summary

Benefits of technology

In addition, the compounds may be used with agents that increase the levels of cAMP or cGMP in cells for a therapeutic benefit. For example, the compounds of the invention may have advantageous effects when used in combination with phosphodiesterase inhibitors, including PDE1 inhibitors (such as those described in Journal of Medicinal Chemistry, Vol. 40, pp. 2196-2210 [1997]), PDE2 inhibitors, PDE3 inhibitors (such as revizinone, pimobendan, or olprinone), PDE4 inhibitors (referenced above), PDE7 inhibitors, or other PDE inhibitors such as dipyridamole, cilostazol, sildenafil, denbutyline, theophylline (1,2-dimethylxanthine), ARIFLO™ (i.e., cis-4-cyano-4-[3-(cyclopentyloxy)-4-methoxyphenyl]cyclohexane-1-carboxylic acid), arofyline, C-11294A, CDC-801, BAY-19-8004, cipamfylline, SCH351591, YM-976, PD-189659, mesiopram, pumafentrine, CDC-998, IC-485, and KW-4490.

Problems solved by technology

These patients are unable to mount a normal inflammatory or immune response; they suffer from disorders such as recurrent infections, poor wound healing, granulocytosis, progressive periodontitis, and umbilical cord separation.

While sufficient levels of CD18 integrins interacting with ICAMs are needed to mount a normal immune response, significant cellular and tissue injury can result in chronic inflammatory states where there is an inappropriate influx of leukocytes to the disease site.

Continuous recruitment of leukocytes from blood vessels into inflamed tissue, as in chronic inflammatory states, can perpetuate tissue injury and lead to excessive fibrous repair and autoimmune disease.

Also, present therapies for many inflammatory and immune diseases have drawbacks.

However, β2-agonists have limited efficacy and inhaled corticosteroids raise safety concerns.

The first three of these therapies raise toxicity issues over long-term (e.g., 6-9 month) use, whereas topical treatments have limited efficacy.

Additionally, these treatments typically are applied only in response to flares and not as a prophylaxis measure.

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