| 摘要 |
<p>A process for regioselectively producing a lignan compound of general formula (I) by reacting a lactone compound of general formula (II) with a compound of the formula: R<7>Cl (R<7> being a tri(lower alkyl)silyl group) in the presence of a base, effecting the addition reaction of an acetylene compound of general formula (III) with the resultant compound, and reducing the product. In said formulas R<1> represents alkyl, cycloalkyl, cycloalkyl-lower alkyl, aralkyl, etc.: R<2> and R<3> each represent lower alkoxy, etc.; R<4> represents lower alkoxy or hydrogen; and R<5> and R<6> each represent lower alkyl. <CHEM></p> |
