Tandem Cycloaddition Reactions of Allenyl Diazo Compounds Forming Triquinanes via Trimethylenemethane Diyls
作者:Taek Kang、Won-Yeob Kim、Yeokwon Yoon、Byung Gyu Kim、Hee-Yoon Lee
DOI:10.1021/ja207591e
日期:2011.11.16
A tandem reaction strategy for forming triquinanes from linear allenyl diazo compounds through an intramolecular 1,3-dipolar cycloadditionreaction of an allenyl diazo group that generates a trimethylenemethane (TMM) diyl followed by an intramolecular [2 + 3] TMMdiylcycloadditionreaction has been developed. The new tandem cycloadditionreaction is readily applicable to the synthesis of complex molecules
Triquinanes from Linear Alkylidene Carbenes via Trimethylenemethane Diyls
作者:Hee-Yoon Lee、Yeonjoon Kim
DOI:10.1021/ja036263l
日期:2003.8.1
The intramolecular [2+3] cycloadditionreaction of the trimethylenemethanediyl generated from the intramolecular cyclopropanation reaction of alkylidene carbene produced linearly fusedtriquinanes regio- and stereoselectively. The current tandem cycloadditionreaction was applied to a 14-step total synthesis of hirsutene from methallyl alcohol.
Total Synthesis of Ceratopicanol through Tandem Cycloaddition Reaction of a Linear Substrate
作者:Sang-Shin Lee、Won-Yeob Kim、Hee-Yoon Lee
DOI:10.1002/asia.201200497
日期:2012.10
Totalsynthesis of ceratopicanol (1) was achieved with a tandemcycloadditionreaction of allenyl diazo compound 6 via a trimethylenemethane (TMM) diyl intermediate. The TMM diyl mediated [2+3] cycloadditionreaction furnished the consecutive quaternary carbon centers and showed an unusual diastereoselectivity.
Synthesis of pyrazole-fused heterocycles by thermal rearrangement of<i>N</i>-aziridinylimino ketenimines
作者:Kee-Jung Lee、Dong-Wook Kim、Boo-Geun Kim
DOI:10.1002/jhet.5570400228
日期:2003.3
triphenylphosphine, carbon tetrachloride, and triethylamine in dichloromethane (Appel's condition) provides a new route to pyrazole-fused heterocycles such as 2,3-dihydro-lH-imidazo[1,2-b]pyrazoles 15 and 9,10-dihydro-47H-pyrazolo[5,l-b]-[1,3]benzodiazepines 17 via the thermalrearrangement of the expected N-aziridinylimino ketenimines 12.
的反应Ñ -aziridinylimino羧酰胺11与三苯基膦的三乙胺在二氯甲烷中的混合物,四氯化碳,和(阿佩尔的条件)提供了新的途径吡唑稠合的杂环,如2,3-二氢-1- ħ咪唑并[1,2 - b ]吡唑15和9,10-二氢47 ħ -吡唑并[5,1- b ] - [1,3]苯并二氮杂类17经由预期的热重排ñ -aziridinylimino烯酮亚胺12。
N-Fused Indolines through Non-Carbonyl-Stabilized Rhodium Carbenoid CH Insertion of N-Aziridinyl Imines
作者:Stuart J. Mahoney、Eric Fillion
DOI:10.1002/chem.201103155
日期:2012.1.2
Under rhodium catalysis, N‐aziridinyl imines provided access to N‐fused indolines through non‐carbonyl‐stabilized rhodium carbenoid CHinsertion. The utility of this methodology for the synthesis of architecturally complex heterocycles was further demonstrated by an expedient total synthesis of (±)‐cryptaustoline (see scheme).