Aktivierte Chinone: Substitution von Azulenen, Benzofuran und Indolen durch 2-Methoxycarbonyl-1,4-benzochinon. Regiospezifische Synthesen von Polymethoxy-fluorenonen und eine neue Synthese des 2,6-Dihydro-naphtho[1,2,3-cd]indol-6-on-Systems
作者:Joannis N. Tsaklidis、Arnold Hofer、Conrad Hans Eugster
DOI:10.1002/hlca.19770600330
日期:1977.4.20
Activated quinones: substitution reactions by methoxy-carbonyl-1,4-benzoquinone of azulenes, benzofuran and indoles; regiospecific syntheses of polymethoxy-fluorenones; a new synthesis of the 2,6-dihydro-naphtho[1,2,3-cd]indol-6-one system.
活化的醌:天青石,苯并呋喃和吲哚的甲氧基-羰基-1,4-苯醌的取代反应;聚甲氧基芴酮的区域特异性合成;2,6-二氢萘并[1,2,3- cd ]吲哚-6-一系统的新合成。
Microwave-assisted intramolecular palladium-mediated cyclizations of <i>o</i>-iodobenzophenones for methoxy fluoren-9-ones
作者:Reda A. Haggam
DOI:10.1080/00397911.2022.2095210
日期:2022.7.18
irradiation is an effective tool in organic reactions that required long reaction times under thermal conditions. Herein substituted 2-iodobenzophenones were transformed into substituted fluoren-9-ones via cesium carbonate and bis(triphenylphosphine) palladium(II) chloride with 56–92% yields within 30–45 min under microwave irradiations. A remarkable decrease in the reaction time with high yield products was
Cu(I)-catalyzed intramolecular cyclizations of substituted 2-iodobenzophenones under thermal and microwave conditions
作者:Reda A. Haggam
DOI:10.1016/j.tet.2013.05.077
日期:2013.8
Novel, easy-to-perform and practical intramolecular Cu(I)-catalyzed cyclizations of substituted 2-iodobenzophenones under thermal and microwave conditions are reported. The isolated cyclized products under microwave conditions are obtained with high yields and with short reaction times offering a valuable and reliable alternative to other protocols for the synthesis of fluorene analogues. (C) 2013 Elsevier Ltd. All rights reserved.
TSAKLIDIS J. N.; HOFER A.; EUGSTER C. H., HELV. CHIM. ACTA <HCAC-AV>, 1977, 60, NO 3, 1033-1060
作者:TSAKLIDIS J. N.、 HOFER A.、 EUGSTER C. H.
DOI:——
日期:——
Microwave-promoted syntheses of fluoren-9-ones and benzisoxazoles
作者:Reda A. Haggam、Hassan A. El-Sayed
DOI:10.1007/s11164-014-1882-4
日期:2015.11
prepared products under microwave conditions are obtained with high yields and within shorter reaction times. Reaction of lithiated bromobenzene with aromatic aldehydes 2a,b delivered diarylmethanols 3a,b that were oxidized to 4a,b. Compound 4a was cyclized to give methoxyfluoren-9-one 5, which was demethylated affording hydroxyfluoren-9-one 6. Compound 4b was reacted with triethylphosphite to produce