ID | 34213 |
FullText URL | |
Author |
Abe, Hitoshi
Takeda, Shigemitsu
Fujita, Takuro
Nishioka, Keisuke
Takeuchi, Yasuo
Kaken ID
Harayama, Takashi
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Abstract | A Pd-mediated intramolecular aryl-aryl coupling reaction of phenyl benzoate derivatives were examined to form benzo[c]chromen-6-ones, and then enantioselective lactone-opening reaction with a borane-oxazaborolidine combination was carried out. The resulting biphenyl was transformed into a key intermediate for the stegane related compounds. The absolute configuration of the biphenyl is also discussed. Stegane and related compounds are important because of their interesting biological activities such as antileukemic properties.1 One of the most outstanding features of their chemical structures is an unsymmetrical 2,2’-disubstituted biphenyl moiety with an axial chirality (Figure 1). For the formation of such a biphenyl part in the syntheses of the stegane families, several approaches have been attempted such as photocyclization,2 Suzuki coupling,3 oxidative biaryl coupling,4 the SNAr reaction,5 Ullmann coupling,6 and the [2+2+2] three-component cyclization reaction.7 |
Keywords | steganone
palladium
phenyl benzoate
lactone concept
biary
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Note | Digital Object Identifier:10.1016/j.tetlet.2004.01.086
Published with permission from the copyright holder. This is the author's copy, as published in Tetrahedron Letters, March 2004, Volume 45, Issue 11, Pages 2327-2329. Publisher URL:http://dx.doi.org/10.1016/j.tetlet.2004.01.086 Direct access to Thomson Web of Science record Copyright © 2004 Elsevier Ltd. All rights reserved. |
Published Date | 2004-3
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Publication Title |
Tetrahedron Letters
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Volume | volume45
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Issue | issue11
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Start Page | 2327
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End Page | 2329
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Content Type |
Journal Article
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language |
English
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Refereed |
True
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DOI | |
Web of Science KeyUT | |
Submission Path | organic_chemistry/1
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