The reactions of potassium phthalimide with Grignard reagents which give 3-hydroxy-3-alkylphthalimidine or 3-alkylidenephthalimidine, are described. The formations of the two products are controlled by treatment of the reaction mixture either with aq. NH₄Cl-NH₃ or with aq.HCl. The structures of the products were decided by spectral data.

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Three sorts of new compounds have been isolated from Leptorumohra miqueliana H. ITO (=Polystichopsis miqueliana TAGAWA) (Aspidiaceae) and they have been named leptorumolin, leptorumol and protofarrenol. Their melting points and molecular formula are as follows : leptorumolin (I), mp 218°, C₁₈H₂₂O₈ ; leptorumol (II), mp 254°, C₁₁H₁₀O₄ ; and protofarrerol, mp 210°, C₁₇H₁₈O₆. In this report, by means of the nuclear magnetic resonance, ultraviolet, infrared and mass spectrum analyses, as well as degradation reactions, the structure of II was determined to be 5, 7-dihydroxy-6, 8-dimethylchromone, and I is also confirmed to be 4-methoxy-D-glucoside of II, whose binding site is at 7-position of chromone ring. On the other hand, from the starting material of 3, 4-dimethylphoroacetophenone, 5, 7-dihydroxy-6, 8-dimethylchromone (II) was synthesized successfully.

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