α-Bromoacrylic Acids as C1 Insertion Units for Palladium-Catalyzed Decarboxylative Synthesis of Diverse Dibenzofulvenes
作者:Minghao Zhang、Wenbo Deng、Mingjie Sun、Liwei Zhou、Guobo Deng、Yun Liang、Yuan Yang
DOI:10.1021/acs.orglett.1c01888
日期:2021.8.6
Herein α-bromoacrylic acids have been employed as C1 insertion units to achieve the palladium-catalyzed [4 + 1] annulation of 2-iodobiphenyls, which provides an efficient platform for the construction of diverse dibenzofulvenes. This protocol enables the formation of double C(aryl)–C(vinyl) bonds via a C(vinyl)–Br bond cleavage and decarboxylation. It is particularly noteworthy that the method features
Aerobic epoxidation of hindered olefins and enol ethers catalyzed by a polymerizable β-ketoesterate complex of iron(III)
作者:Luigi Lopez、Piero Mastrorilli、Giuseppe Mele、Cosimo F. Nobile
DOI:10.1016/s0040-4039(00)73259-x
日期:1994.5
Peculiar hindered olefins and derivatives have been epoxidized, under Mukaiyama's conditions, using iron(III) catalytic centres. The experimental results allow to rule out the involvement of singlet oxygen and free peroxyacids as active species.
Oxirane derivatives having acridane and adamantane structures were designed as a novel chemiluminescent precursor and were found to have a characteristic chemiluminescent ability which is introduced by a two-step trigger reaction involving treatment with alkaline H2O2 and subsequent acidic treatment. Structural study of the oxirane derivatives showed that the CIEEL mechanism is involved in this chemiluminescent reaction and it was also found that the chemiluminescent profile is affected by the kind of acid employed in the trigger reaction. (C) 2001 Elsevier Science Ltd. All rights reserved.
9-Adamantylidene-10-alkyl-9,10-dihydroacridine oxide as a novel and potential chemiluminescent precursor: Proximity effect of the nitrogen atom
An oxirane derivative having acridane and adamantane moieties was prepared and proved to show potential chemiluminescent property on treatment with alkaline hydroperoxide and subsequently with hydrochloric acid, in which the electron-donating property of the nitrogen was experimentally shown to play an important role for the chemiluminescence. (C) 1997 Elsevier Science Ltd.
Monodeoxygenation of spiro adamantane-1,2-dioxetanes induced by aminium salt
作者:Luigi Lopez、Gianluca M. Farinola、Angelo Nacci、Stefano Sportelli
DOI:10.1016/s0040-4020(98)00375-5
日期:1998.6
The reactions of 4,4-dimethylspiro[adamantane-2,3'-[ 1,2]-diaxetane] (1a) and biadamantylidene-1, 2-dioxetane (2a) in dichloromethane, at different reaction temperatures, with tris(2,4-dibromophenyl) aminium hexachloroantimonate A afford high yields of the rearranged ketones 2-methyladamantyl-methyl ketone (3) and spiro[adamantane-2,4'-homoadamantan-5'-one] (8), respectively. A cation radical monodeoxygenation process is suggested. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.