セリ科植物成分の研究 第2報
ウドモドキ根の成分 その2
1956 年 76 巻 6 号 p. 666-669
詳細
1956 年 76 巻 6 号 p. 666-669
Boiling of the glabra-lactone (I) with 30% potassium hydroxide affords 5, 7-dimethoxyacetylcoumarin (VI) and oxidation of the ethyl ether, formed by ethylation of the hydroxyl forming the lactone, with potassium permanganate gives 2, 4-dimethoxy-6-ethoxyacetophenone. Therefore, (VI) would be represented by the structure shown in (c) and the structure of (I) should be (Ia) or (Ib). However, (Ib) must be denied since (I) is not optically active, no isomer is formed by the transition of the oxygen forming the epoxide ring, and there is no formation of a dihydroxy compound by the addition of 1 mole of water to the cleaved epoxide ring. Therefore, the formula (Ia) is given for (I).
