SYNTHESIS OF THE MAJOR SEX PHEROMONE OF THE OLIVE FLY (DACUS OLEAE) AND RELATEDCOMPOUNDS
Abstract
A. TREATMENT OF THP-4-IODOBUTANOL WITH MAGNESIUM IN ETHER FOLLOWED BY REACTIONWITH 2,3-DIBROMO-TETRAHYDRO-PYRAN AND SUBSEQUENT ELIMINATION OF NBR WITH SODIUM HYDRID (BENZENE) FOLLOWED BY CYCLIZATION IN ACIDIC MEDIA (THF, H2O, P-TOLUENE SULFONIC ACID) GAVE 1,7- DIOXASPIRO[5,5]UNDECANE. B. REACTION OF 2,6-DIMETHYL-6-HYDROXY-2H-3-ONE WITH N-PROPANOL IN THE PRESENCE OF FEW DROPS OF PERCHLORIC ACID GAVE AN INTERMEDIATE WITH UPON HYDROGENATION-HYDROGENOLYSIS AND WOLF- KISHNER REDUCTION GAVE 2,6-(DIMETHYL-6-PROPYLOXY-2H-TETRAHYDROPYRAN) ANALOGUE OF DACUS OLEAE FEROMONE. C. TREATMENT OF 2-HYDROXY-1- OXASPIRO[5,5] UNDECANE-3-EN-5-ONE WITH ETHYL-CHLORO-FORMATE AND TRIETHANOLAMINE, FOLLOWED BY HYDROGONOSIS AND SUBSEQUENT WOLF- KISHNER REDUCTION GAVE 1-OXASPIRO [5,5]UNDECANE, A CARBOCYCLIC ANALOGUE OF DACUS OLEAE.
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