Electronic control of stereoselectivity. 6. Directionality of singlet oxygen addition to 1,4-dimethoxynaphthalenes laterally fused to bridged bicyclic systems
Electronic control of stereoselectivity. 6. Directionality of singlet oxygen addition to 1,4-dimethoxynaphthalenes laterally fused to bridged bicyclic systems
Design and synthesis of propellane derivatives and oxa-bowls via ring-rearrangement metathesis as a key step
作者:Sambasivarao Kotha、Rama Gunta
DOI:10.3762/bjoc.11.188
日期:——
Various intricate propellane derivatives and oxa-bowls have been synthesized via a ring-rearrangementmetathesis (RRM) as a key step starting from readily accessible starting materials such as p-benzoquinone, 1,4-naphthoquinone and 1,4-anthraquinone.
Dilithium 2,2′-methylenebis(4,6-di-tert-butylphenoxide) as a bidentate Lewis acid in organic synthesis
作者:Takashi Ooi、Akira Saito、Keiji Maruoka
DOI:10.1016/s0040-4039(98)00575-9
日期:1998.5
Dilithium 2,2'-methylenebis(4,6-di-tert-butylphenoxide) can be successfully utilized as a bidentate Lewis acid for simultaneous coordination to carbonyl groups, thereby accelerating the Diels-Alder reactions. The double activation ability of the bidentate lithium reagent toward carbonyls is emphasized in comparison with the corresponding monodentate lithium reagent. (C) 1998 Elsevier Science Ltd. All rights reserved.
The 4:2 Diels–Alder Adduct of 1,3-Cyclopentadiene with 1,4-Naphthoquinone
作者:B. Güneş、H. Soylu、S. Özbey、E. Kendi、A. Aydin
DOI:10.1107/s0108270197005830
日期:1997.9.15
The title compound, 1,4-methano-1,4,4a,9a-tetrahydroanthracene-9, 10-dione, C15H12O2, is a Diels-Alder adduct resulting from a [4+2] cycloaddition of 1,3-cyclopentadiene with p-naphthoquinone.
Preparation process of quinone derivative and intermediate for the preparation thereof