| 摘要 |
The present invention describes the preparation of 6, 7 -dihydro-1H-indeno[5, 4 -b] furan-8 (2H) -one of formula V, a key intermediate in preparation of ramelteon. The present invention also describes further preceding intermediate compounds useful for the synthesis of 6, 7-dihydro-1H-indeno[5, 4-b] furan-8 (2H) -one.
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