2-amino-3-aroyl-benzo[.beta.]thiophenes and methods for preparing and using same to produce 6-hydroxy-2-(4-hydroxyphenyl)-3-[4-(2-aminoethoxy)-benzoyl]benzo[.beta.]thiophenes
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United States of America Patent
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Nov 14, 1995
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N/A
app pub date -
Jun 10, 1994
filing date -
Jun 10, 1994
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Abstract
A group of 2-amino-3-aroyl-benzo[.beta.]thiophenes are prepared by treating an aldehyde with an anion of dimethylamino thioformamide, cyclizing the .alpha.-hydroxy thioamide, and subsequently acylating the benzo[.beta.]thiophene to yield the 2-amino-3-aryl derivative. These compounds may be treated with suitable phenyl Grignard reagents, and after deprotection, yield 6-hydroxy-2-(4-hydroxyphenyl)-3-[4-(2-piperidinoethoxy)benzoyl]benzo[.beta.]thiophene.
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