Synthesis of Some New Dihalophenyl- and Dihalobenzylisocoumarins and Their (dl)-3,4-Dihydroderivatives

3-Dihalophenyl- and dihalobenzylisocoumarins (3a-c) were synthesized by condensation of homophthalic acid (1) with dihalobenzoyl- and dihalophenylacetyl chlorides (2a-c), respectively. The alkaline hydrolysis of these isocoumarins (2a-c) afforded keto-acids (4a-c). (dl)-3-(Dihalophenyl)- and (dl)-3-...

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Veröffentlicht in:Turkish journal of chemistry 2005-01, Vol.29 (3), p.321-325
Hauptverfasser: SHAFIQ, Zahid, ARFAN, Muhammad
Format: Artikel
Sprache:eng
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Zusammenfassung:3-Dihalophenyl- and dihalobenzylisocoumarins (3a-c) were synthesized by condensation of homophthalic acid (1) with dihalobenzoyl- and dihalophenylacetyl chlorides (2a-c), respectively. The alkaline hydrolysis of these isocoumarins (2a-c) afforded keto-acids (4a-c). (dl)-3-(Dihalophenyl)- and (dl)-3-(dihalobenzyl)- 3,4-dihydroisocoumarins (6a-c) were obtained by reduction of keto-acids (4a-c) to racemic hydroxy-acids (5a-c) followed by cyclodehydration using acetic anhydride.
ISSN:1300-0527
1303-6130
1303-6130