Sequential Platinum‐Catalyzed Cycloisomerization and Cope Rearrangement of Dienynes
作者:Sun Young Kim、Youjung Park、Young Keun Chung
DOI:10.1002/anie.200905361
日期:2010.1.8
Enyne‐enyne‐o: Tandem cycloisomerization of dienynescatalyzed by platinum dichloride and subsequent Coperearrangement affords bicyclic rings (see scheme; Z=NTs, O, CH2), such as bicyclo[3.2.2]nonadienes 1 or tetrahydrocyclohepta[c]pyrans and ‐pyridines 2, in high yields.
烯炔-烯炔:二氯化铂催化的二烯的串联环异构化和随后的Cope重排提供双环(见方案; Z = NTs,O,CH 2),例如双环[3.2.2]壬二烯1或四氢环庚基[ c ]吡喃和吡啶2,高产。
Sequential Diels-Alder and Cobalt Octacarbonyl Catalyzed Pauson-Khand Reactions in the Formation of Polycyclic Enones
作者:Young Chung、Soo Choi、Sang Lee、Kang Park
DOI:10.1055/s-2007-984511
日期:2007.7
Sequential reactions of Diels-Alder and Pauson-Khand reactions between dienynes and dienophiles in a one-pot reaction have been demonstrated using 10 mol% dicobaltoctacarbonyl. Synthesis of tetracyclic enones is reported.
Selectivity in Cobalt Carbonyl Mediated Cycloaddition of Dienynes
作者:Young Keun Chung、Kang Hyun Park、Soo Young Choi、So Yeon Kim
DOI:10.1055/s-2006-932466
日期:——
Dicobalt octacarbonyl mediated cycloaddition of dienynes in the presence of carbon monoxide has been studied. Three main competing reaction routes, two carbonylative cycloaddition reactions and a Diels-Alder reaction, have been recognized depending upon the substrate and reaction conditions. Judicious design of the substrate and selection of reaction conditions allow control of the reaction pathway.
An efficient Rh-catalyst system for the intramolecular [4+2] and [5+2] cycloaddition reactions
作者:Bin Wang、Ping Cao、Xumu Zhang
DOI:10.1016/s0040-4039(00)01432-5
日期:2000.10
A new Rh-catalyst system has been developed for the [4+2] and [5+2] cycloadditionreactions. This new system shows high reactivity at room temperature and the Rh-center bears tunable phosphine ligands. Up to 1000 turnovers have been obtained for the [4+2] cycloadditionreaction at room temperature.