Synthesis of oxygen-substituted benzocycloheptenes as valuable intermediate products for the production of tissue-selective estrogens
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United States of America Patent
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Jan 22, 2008
Grant Date -
Aug 28, 2003
app pub date -
Oct 15, 2002
filing date -
Oct 12, 2001
priority date (Note) -
Expired
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Abstract
The invention relates to intermediate products and a new process for the production of benzocycloheptene C. ##STR00001## The process for the production of its new intermediate products according to the invention starts from economical starting materials, provides the intermediate stages in high yields and high purity, without chromatographic purification steps, and allows production on an industrial scale.
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