Gold(I)-Catalyzed [4+2] Annelation/Nucleophilic Addition Sequence: Stereoselective Synthesis of Functionalized Bicyclo[4.3.0]nonenes
作者:Sebastian Böhringer、Fabien Gagosz
DOI:10.1002/adsc.200800413
日期:2008.11.3
The gold(I)-catalyzed isomerization of readily available 1,8-dien-4-ynes allows the rapid construction of a variety of synthetically useful bicyclo[4.3.0]nonenes by a stereoselectivesequence involving a [4+2] annelation/nucleophilicaddition process.
Methyl 11-tert-butyldimethylsilyloxyeicosa-8(Z), 12(E), 14(E)-trienoate was stereoselectively cyclized by treatment with Hg(OCOCF3)2 to give a properly functionalized PG skeleton, which was converted to PGE1 in good over all yield.
Synthesis of cyclobutane-fused dihydroazepines via rhodium-catalyzed intramolecular [4 + 3] cycloaddition of 1-sulfonyl-1,2,3-triazoles
作者:Zhaoqi Wu、Heng Wang、Tianci Chen、Ze-Feng Xu、Chuan-Ying Li
DOI:10.1016/j.tetlet.2023.154607
日期:2023.7
We report a rhodium-catalyzed intramolecular [4+3] cycloaddition of 1-sulfonyl-1,2,3-triazoles that enables the efficient synthesis of cyclobutane-fused dihydroazepines in moderate to good yields. Meanwhile, three stereo centers were constructed, and one single diastereomer was obtained in each case. The stereoselectivity control was also discussed.
Gold(I)-Catalyzed 5-endo Hydroxy- and Alkoxycyclization of 1,5-Enynes: Efficient Access to Functionalized Cyclopentenes
作者:Andrea K. Buzas、Florin M. Istrate、Fabien Gagosz
DOI:10.1002/anie.200604140
日期:2007.2.5
A Concise Route to Benzofused Macrolactones via Ynolides: Cycloproparadicicol
作者:Zhi-Qiang Yang、Samuel J. Danishefsky
DOI:10.1021/ja036192q
日期:2003.8.1
A new facile synthesis has been developed for nanomolar Hsp90 inhibitor, cycloproparadicicol (2). Our approach relied on cobalt-complexation promoted RCM, in combination with tandem Diels-Alder/retro-Diels-Alder reactions to assemble the resorcycinylic macrolactone.