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.