| 摘要 |
<p>NEW MATERIAL:A compound expressed by formula I [R<1> is 1-10C aliphatic group, having 0-3 unsaturated bonds and optionally substituted by lower alkoxy, etc., or H; X is H or a protecting group of OH; Y is C(OR<21>)(SR<22>)SiR<31> R<32>R<33> (R<21> is lower alkyl; R<22> is phenyl which may be substituted by 1-3 lower alkyl, etc.; R<31>-R<33> are lower alkyl or R<22>)]. EXAMPLE:2-Carbomethoxymethyl-3-[methoxy(phenylthio)trimethylsilylmethy l]-4- [dimethyl(tert-butyl)silyloxy]cyclopentanone. USE:A medicine, agricultural chemical and intermediate therefor. PREPARATION:A compound expressed by formula II is reacted with a compound expressed by formula III to give a reaction product, which is then reacted with a compound expressed by the formula R<1>Z (Z is halogen).</p> |
