| 摘要 |
A. Compounds of formula (I) R' = brosyloxy, mesyloxy, tosyloxy, halogen, aralkoxy, subst. aralkoxy, alkenyloxy, alkynyloxy, opt. subst. aryloxy, tolyloxy, NH2. R2 = alkyl, aralkyl, subst. benzyl, opt. subst. aryl, heteroaryl contng. 1-3 O, S or N atoms; alkenyl or alkynyl. B. Process for preparing a compound of formula (II) by reacting a cpd. of formula (III) CH3. .COX (IV) with a compound followed by reduction of the product I. X = Br, Cl. |
