| TAHEEBO JAPAN CO., LTD. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100215625 | EFFICIENT PREPARATION OF NAPHTHOQUINONE ANTICANCER ACTIVE INGREDIENTS - One of the problems to be resolved by the present invention is to stably and sustainably produce active ingredients contained in Bignoniaceous plants of which a mass production is difficult in a conventional manner. The present invention relates to a method for efficiently preparing an anticancer active ingredient NQ | 08-26-2010 |
| 20090042977 | Anticancer Compound, Intermediate Therefor, and Processes for Producing These - The present invention provides a method for easily and inexpensively preparing a racemate or an optically-active 2-(1-hydroxyethyl)-5-hydroxynaphtho[2,3-b]furan-4,9-dione in high yields, 2-acetyl-2,3-dihydro-5-hydroxynaphtho[2,3-b]furan-4,9-dione which is useful as an intermediate for preparing NFD, and an anticancer agent comprising 2-(1-hydroxyethyl)-5-hydroxynaphtho[2,3-b]furan-4,9-dione as an active ingredient. | 02-12-2009 |
| 20080300415 | Preparation of optically active 2-(1-hydroxyethyl)-5-hydroxynaphtho[2,3-b]furan-4, 9-diones having anticancer activities - An object of the present invention is to provide a method for efficiently preparing (S)-2-(1-hydroxyethyl)-5-hydroxynaphtho[2,3-b]-furan-4,9-dione useful as a medicine at a low cost and in large amounts. According to the present invention, the desired (S)-2-(1-hydroxyethyl)-5-hydroxynaphtho[2,3-b]furan-4,9-dione can be prepared with high efficiency at a low cost and in large amounts by asymmetrically reducing 2-acetyl-5-hydroxynaphtho[2,3-b]furan-4,9-dione in the presence of an asymmetric ruthenium complex and a hydrogen donor. | 12-04-2008 |
