2,7-DİHİDROKSİNAFTALİN İLE ETİL ASETDASETATIN PECHMANN KONDENSAZYON ÜRÜNLERİNİN İNCELENMESİ

Year 2002, Volume: 3 Issue: 1, 7 - 10, 23.07.2016

Hakan Kolancılar

Abstract

İki benzokumarin ve bir benzokromon, kondensazyon aracı olarak sülfıirik asid çözeltisi varlığında 2,7-dihidroksinaftalin ve etil asetoasetat (EAA)' tan başlayarak sentezlendi. Bu bileşiklerin yapıları 1H NMR, 13C NMR, IR ve Kütle spektral metodlarla açıklandı. Artan H2S04 konsantrasyonu en önemli gözlem olan benzokromonun 3 verimini arttırır.

Keywords

2, 7-Dihidroksinaftalin, Etil asetoasetat, Benzokumarin, Benzokromon, Pechmann Kondensazyonu.

INVESTIGATION OF PECHMANN CONDENSATION PRODUCTS OF ETHYL ACETOACETATE WITH 2,7-DIHYDROXYNAPHTHALENE

Abstract

Two benzocoumarins and a benzochromone were synthesized starting from 2,7-dihydroxynaphthalene (2,7-DHN) and ethyl acetoacetate (EAA) in the presence of sulphuric acid solutions as condensing agent. The structures of the products have been elucidated by 1H NMR, 13C NMR, IR and Mass spectral methods. Increasing concentration of H2S04 promotes the yield of benzochromone 3 is the most important observation.

Keywords

2, 7-Dihydroxynaphthalene, Ethyl acetoacetate, Benzocoumarin, Benzokromon, Pechmann Condensation.