Photoinduced Decarbonylative Rearrangement of Bicyclo[2.2.2]Octenones: Synthesis of the Marasmane Skeleton
作者:Chun-Chieh Wang、Yi-Chen Ku、Gary Jing Chuang
DOI:10.1021/acs.joc.5b02140
日期:2015.11.6
cis-fused and the five- and three-membered rings are mutually trans, provides a synthetic challenge for organic chemists. In this work, we took advantage of the photoinduced decarbonylative rearrangement of bicyclo[2.2.2]octenone to develop a new methodology for construction of the highly functionalized fused-5,6,3-tricyclic ring structure in a concise reaction sequence.
Synthesis, checkpoint kinase 1 inhibitory properties and in vitro antiproliferative activities of new pyrrolocarbazoles
作者:Elisabeth Conchon、Fabrice Anizon、Bettina Aboab、Roy M. Golsteyn、Stéphane Léonce、Bruno Pfeiffer、Michelle Prudhomme
DOI:10.1016/j.bmc.2008.02.061
日期:2008.4
replaced by a five-membered ring lactam system or a dimethylcyclopentanedione. Moreover, the synthesis of an original structure in which a sugar moiety is attached to the indole nitrogen and to a six-membered D ring via an oxygen is reported. The inhibitory activities of the newly synthesized compounds toward checkpoint kinase 1 and their in vitro antiproliferativeactivities toward three tumor cell lines:
Breaking Symmetry with Symmetry: Bifacial Selectivity in the Asymmetric Cycloaddition of Anthracene Derivatives
作者:Carles Rodríguez-Escrich、Rebecca L. Davis、Hao Jiang、Julian Stiller、Tore K. Johansen、Karl Anker Jørgensen
DOI:10.1002/chem.201300142
日期:2013.2.25
Push to activate: A new catalytic strategy for the activation of anthracenederivatives has been developed. From symmetrical starting materials, enantioselective cycloaddition reactions can be achieved by employing a C2‐symmetric aminocatalyst. This selectivity is due to the gain or loss of conjugation between the enamine and the anthracene in the two transition‐state structures. This methodology is demonstrated
Stereocontrolled synthesis of [3.1.0]bicyclohexanones by cyclopropanation of enones with benzylidene sulfuranes
作者:Alain Krief、Dominique Swinnen、Denis Billen
DOI:10.1016/s0040-4039(02)01017-1
日期:2002.8
Bicyclo[3.1.0]hexanones bearing an aryl group on the cyclopropane ring are stereoselectively prepared on reaction of the corresponding benzylidene sulfuranes with cyclopentenones. The synthesis of compounds bearing geminal phenyl and methyl groups on the cyclopropane ring proves to be possible because the corresponding sulfonium salt, inaccessible until now, is now available.
Radicals formed from the esters of thiohydroxamic acids readily add to electron deficient olefins to give adducts of potential synthetic value in variable yield. In certain cases the added sulphur function is easily eliminated with reformation of olefin.