Octacarbonyldicobalt Promoted Transformation of 1-(1,2-Propadienyl)cyclopropanols to 1,4-Hydroquinones
作者:Nobuharu Iwasawa、Yufu Owada、Takeshi Matsuo
DOI:10.1246/cl.1995.115
日期:1995.2
A novel transformation reaction of 1-(1,2-propadienyl)cyclopropanols to 1,4-hydroquinone derivatives was developed utilizing the interaction of 1,2-propadienes and Co2(CO)8.
Dual Visible Light Photoredox and Gold-Catalyzed Arylative Ring Expansion
作者:Xing-zhong Shu、Miao Zhang、Ying He、Heinz Frei、F. Dean Toste
DOI:10.1021/ja500716j
日期:2014.4.23
A combination of visible light photocatalysis and gold catalysis is applied to a ring expansion-oxidative arylation reaction. The reaction provides an entry into functionalized cyclic ketones from the coupling reaction of alkenyl and allenyl cycloalkanols with aryl diazonium salts. A mechanism involving generation of an electrophilic gold(III)-aryl intermediate is proposed on the basis of mechanistic studies, including time-resolved FT-IR spectroscopy.
Transformation of 1-(1,2-propadienyl)cyclopropanols into substituted hydroquinones employing octacarbonyldicobalt
作者:Yufu Owada、Takeshi Matsuo、Nobuharu Iwasawa
DOI:10.1016/s0040-4020(97)00367-0
日期:1997.8
A novel transformation of 1-(1,2-propadieny])cyclopropanols into substituted 1,4-hydroquinones has been developed utilizing the interaction of 1.2-propadienes and octacarbonyldicobalt (Co-2(CO)(8)) This reaction was applied to the synthesis of vitamin E and K analogs. (C) 1997 Elsevier Science Ltd.
Iwasawa Nobuharu, Owada Yufu, Matsuo Takeshi, Chem. Lett, (1995) N 2, S 115-116
作者:Iwasawa Nobuharu, Owada Yufu, Matsuo Takeshi
DOI:——
日期:——
Gold(I)-Catalyzed Enantioselective Ring Expansion of Allenylcyclopropanols
作者:Florian Kleinbeck、F. Dean Toste
DOI:10.1021/ja904055z
日期:2009.7.8
The asymmetric gold(I)-catalyzedring expansion of 1-allenylcyclopropanols is described. The method provides synthetically valuable cyclobutanones with a vinyl-substituted quaternary stereogenic center in high enantioselectivities and yields. The method shows a broad substrate scope, tolerating protected alcohols and amines, alkenes, unsaturated esters, and acetals. The reaction is easily adjustable