caa a22 4500 469038675 CHVBK 20180323132803.0 cr unu---uuuuu 170328e19920601xx s 000 0 eng 10.1007/BF00816849 doi (NATIONALLICENCE)springer-10.1007/BF00816849 A study of the Claisen rearrangement of 7-(3-phenyl-2-propenyloxy)-3-phenyl-(4 H )-1-benzopyran-4-one derivatives [Elektronische Daten] [Shubhangi Joshi, Kunjbihari Trivedi] Die Claisen-Umlagerung von 7-(3-Phenyl-2-propenyloxy)-3-phenyl-(4 H )-1-benzopyran-4-on Summary: The Claisen rearrangement of 7-(3-phenyl-2-propenyloxy)-3-phenyl-(4H)-1-benzopyran-4-one (2 a) gave 7-hydroxy-8-(1-phenyl-2-propenyl)-3-phenyl-(4H)-1-benzopyran-4-one (3 a) and 2,3-dihydro-2,6-diphenyl-3-methyl-(7H)furo[2,3-h]-1-benzopyran-7-one (7 a). 2-Methyl-7-(3-phenyl-2-propenyloxy)-3-phenyl-(4H)-1-benzopyran-4-one (2 b) afforded4 b and7 b. 8-Methyl-7-(3-phenyl-2-propenyloxy)-3-phenyl-(4H)-1-benzopyran-4-one (12) gave only the alkali soluble product 7-hydroxy-8-methyl-6-(1-phenyl-2-propenyl)-3-phenyl-(4H)-1-benzopyran-4-one (13).3 a,4 b, and13 were further cyclized in acidic medium to9 a,10 b, and14 followed by dehydrogenation. Springer-Verlag, 1992 Claisen rearrangement nationallicence 7-(3-Phenyl-2-propenyloxy)-3-phenyl-(4 H )-1-benzopyran-4-one nationallicence 8-Methyl-7-(3-phenyl-2-propenyloxy)-3-phenyl-(4 H )-1-benzopyran-4-one nationallicence Joshi Shubhangi Department of Chemistry, Faculty of Science, M. S. University of Baroda, 390002, Baroda, India aut Trivedi Kunjbihari Department of Chemistry, Faculty of Science, M. S. University of Baroda, 390002, Baroda, India aut Monatshefte für Chemie / Chemical Monthly Springer-Verlag 123/6-7(1992-06-01), 557-564 0026-9247 123:6-7<557 1992 123 706 https://doi.org/10.1007/BF00816849 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00816849 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Joshi Shubhangi Department of Chemistry, Faculty of Science, M. S. University of Baroda, 390002, Baroda, India aut NATIONALLICENCE 700 1- Trivedi Kunjbihari Department of Chemistry, Faculty of Science, M. S. University of Baroda, 390002, Baroda, India aut NATIONALLICENCE 773 0- Monatshefte für Chemie / Chemical Monthly Springer-Verlag 123/6-7(1992-06-01), 557-564 0026-9247 123:6-7<557 1992 123 706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer