Tandem Ullmann–Goldberg Cross-Coupling/Cyclopalladation-Reductive Elimination Reactions and Related Sequences Leading to Polyfunctionalized Benzofurans, Indoles, and Phthalanes
作者:Faiyaz Khan、Mehvish Fatima、Moheb Shirzaei、Yen Vo、Madushani Amarasiri、Martin G. Banwell、Chenxi Ma、Jas S. Ward、Michael G. Gardiner
DOI:10.1021/acs.orglett.9b02235
日期:2019.8.16
Cu[I]- and Pd[0]-based catalysts, compounds such as 1 and 7 engage in tandem Ullmann–Goldberg cross-coupling and cyclopalladation-reductive elimination reactions to givebenzofurans such as 8. Related reactions involving hetero-Michael additions of o-halogenated phenols or anilines to propiolates and the Pd[0]-catalyzed cyclization of the resulting conjugates provide, in a one-pot process, alternately
Stereoselective Total Synthesis of (−)-Spirofungin A by Utilising Hydrogen-Bond Controlled Spiroketalisation
作者:John E. Lynch、Shannon D. Zanatta、Jonathan M. White、Mark A. Rizzacasa
DOI:10.1002/chem.201002501
日期:2011.1.3
The stereoselective total synthesis of the spiroketal containing Streptomyces metabolite (−)‐spirofungin A (1) is described. A key step involved a spiroketalisation controlled by an intramolecular H‐bond which favoured the desired spiroketal 4 (13:1 ratio). The presence of the intramolecular H‐bond in 4 is possibly due to a 1,5‐alkyne–oxygen interaction. Other key steps include an efficient cross‐metathesis
Total Synthesis of (−)‐Bastimolide A: A Showcase for Type I Anion Relay Chemistry
作者:Joshua B. Cox、Alex A. Kellum、Yiwen Zhang、Bo Li、Amos B. Smith
DOI:10.1002/anie.202204884
日期:2022.7.11
The introduction of remote stereochemistry via successive Type I Anion Relay Chemistry (ARC) coupling of commercially available enantioenriched epoxides has enabled a 20-step totalsynthesis of (−)-bastimolide A. The streamlined assembly and manipulation of ARC products demonstrates a versatile approach that could be leveraged toward other polyhydroxylated macrolides
通过连续 I 型阴离子中继化学 (ARC) 偶联市售的对映体富集环氧化物,引入远程立体化学,实现了 (−)-巴司莫内酯 A 的 20 步全合成。ARC 产品的简化组装和操作展示了一种多功能方法,可用于其他多羟基化大环内酯类药物
A SIMPLE AND CONVENIENT METHOD FOR THE PREPARATION OF (Z)-b-IODOACROLEIN AND OF (Z)- OR (E)-Y-IODO ALLYLIC ALCOHOLS: (Z)- AND (E)-1-IODOHEPT-1-EN-3-OL