| 摘要 |
PCT No. PCT/JP98/00694 Sec. 371 Date Oct. 20, 1998 Sec. 102(e) Date Oct. 20, 1998 PCT Filed Feb. 19, 1998 PCT Pub. No. WO98/37042 PCT Pub. Date Aug. 27, 1998Optically active materials of tricyclic compounds, for example, cyclopenta [b] benzofuran derivatives represented by the following formula: wherein R1, R2, Y and Z independently represent hydrogen, halogen, an alkyl group, or an aryl group; and n represents 0 to 4, are directly produced by adding an optically active alcohol, amine and/or metal salt thereof.
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