Form-II crystal of 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino]butyloxy}-N-(methylsulfonyl) acetamide, method for producing the same, and use thereof
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United States of America Patent
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May 17, 2016
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Jun 5, 2014
app pub date -
Jan 22, 2014
filing date -
Jun 26, 2009
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Abstract
Form-II crystal of 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino]butyloxy}-N-(methylsulfonyl)acetamide and a method of producing the crystal are provided. The Form-II crystal exhibits diffraction peaks in its X-ray powder diffraction spectrum at least at the following angles of diffraction 2θ when the spectrum is obtained by using Cu Kα radiation: 9.0 degrees, 12.9 degrees, 20.7 degrees, and 22.6 degrees. The Form-II crystal can be produced by crystallizing the subject compound from an alcoholic solvent, a ketone solvent, a saturated hydrocarbon solvent, an ether solvent, water, or a mixture of these solvents. The crystal may be administered as an active ingredient to a subject for the purpose of treating or preventing certain diseases, disorders, and symptoms, or for promoting angiogenesis or gene therapy. The targeted diseases and disorders include transient ischemic attack, diabetic neuropathy, diabetic gangrene, peripheral circulatory disturbance, connective tissue disease, reocclusion/restenosis after percutaneous transluminal coronary angioplasty, arteriosclerosis, thrombosis, hypertension, pulmonary hypertension, and diabetic nephropathy.
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