Iminium ion and acyliminium ion initiated cyclization reactions of vinylsilanes. Regiocontrolled synthesis of tetrahydropyridines and related heterocycles
Selected compounds are effective for treatment of pain and diseases, such as inflammation mediated diseases. The invention encompasses novel compounds, analogs, prodrugs and pharmaceutically acceptable derivatives thereof, pharmaceutical compositions and methods for prophylaxis and treatment of diseases and other maladies or conditions involving pain, inflammation, and the like. The subject invention also relates to processes for making such compounds as well as to intermediates useful in such processes.
Compounds of formula I: in free or salt or solvate form, where R
1
, R
2
, R
3
and R
20
have the meanings as indicated in the specification, are useful for treating diseases mediated by the ALK-5 and/or ALK-4 receptor. Pharmaceutical compositions that contain the compounds and processes for preparing the compounds are also described. These compounds are useful for the treatment of inflammatory or obstructive airways diseases such as pulmonary hypertension, pulmonary fibrosis, liver fibrosis, cancer, muscle diseases such as muscle atrophies and muscle dystrophies, and systemic skeletal disorders such as osteoporosis.