发明公开
EP0355617A1 Process for the manufacture of benzopyran derivatives 失效
Verfahren zur Herstellung von Benzopyran-Derivaten。

Process for the manufacture of benzopyran derivatives
摘要:
The invention is directed to a process and intermediates for the preparation of benzopyrans such as racemic-6-acetyl-­7-[5-(4-acetyl-3-hydroxy-2-propylphenoxy)pentyloxy]-3,4-­dihydro-2H-1-benzopyran-2-carboxylic acid.
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