Condensation of 1-indanone (1) with ethyl bromoacetate and zinc affords Reformatsky reaction product 2; then reduction with LiAlH4 gives diol 3. Dehydration with H2SO4 gives the indene ethanol 4. Acid catalyzed condensation of 4 with ethyl acetoacetate then gives the fused tetrahydropyran derivative 5 (no doubt by a scheme quite analogous to prodolic acid). The ester is then saponified to the corresponding acid, which is then converted to the dimethylamide (6). Reduction with LiAlH4 completes the synthesis of the antidepressant agent pirandamine (7).
^ abcPugsley T, Lippmann W (May 1976). "Effects of tandamine and pirandamine, new potential antidepressants, on the brain uptake of norepinephrine and 5-hydroxytryptamine and related activities". Psychopharmacology. 47 (1): 33–41. doi:10.1007/BF00428698. PMID1085452. S2CID8354739.
^Lippmann W, Pugsley TA (August 1976). "Pirandamine, a relatively selective 5-hydroxytryptamine uptake inhibitor". Pharmacological Research Communications. 8 (4): 387–405. doi:10.1016/0031-6989(76)90039-4. PMID1088377.
^ abLippmann W, Seethaler K (April 1977). "Effects of tandamine and pirandamine, selective blockers of biogenic amine uptake mechanisms, on gastric acid secretion and ulcer formation in the rat". Life Sciences. 20 (8): 1393–400. doi:10.1016/0024-3205(77)90367-8. PMID853871.
^I. Jirkovsky, L. G. Humber and R. Noureldin,Eur. J. Med. Chem., 11, 571 (1976).
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