已经开发了一种用于将容易获得的外消旋、支链芳族烯丙酯转化为支链烯丙胺、醚和烷基的催化方案。钯催化的支链烯丙基酯异构化为末端烯丙基酯,然后依次进行铱催化的烯丙基取代,以良好的收率得到支链烯丙基产物,具有高区域异构和对映异构选择性。富电子和缺电子支化烯丙基酯均产生 >90% ee 的产物。对于来自乙酸2-噻吩酯和碳酸二烯酯的反应的产物,也观察到高对映体过量。
已经开发了一种用于将容易获得的外消旋、支链芳族烯丙酯转化为支链烯丙胺、醚和烷基的催化方案。钯催化的支链烯丙基酯异构化为末端烯丙基酯,然后依次进行铱催化的烯丙基取代,以良好的收率得到支链烯丙基产物,具有高区域异构和对映异构选择性。富电子和缺电子支化烯丙基酯均产生 >90% ee 的产物。对于来自乙酸2-噻吩酯和碳酸二烯酯的反应的产物,也观察到高对映体过量。
Organophotoredox/palladium dual catalytic decarboxylative Csp<sup>3</sup>–Csp<sup>3</sup>coupling of carboxylic acids and π-electrophiles
作者:Kaitie C. Cartwright、Jon A. Tunge
DOI:10.1039/d0sc02609c
日期:——
A dual catalytic decarboxylative allylation and benzylation method for the construction of new C(sp3)–C(sp3) bonds between readily available carboxylic acids and functionallydiverse carbonate electrophiles has been developed. The new process is mild, operationally simple, and has greatly improved upon the efficiency and generality of previous methodology. In addition, new insights into the reaction
An efficient Ru-catalyzed regioselective allylictrifluoromethylthiolation reaction of allylic carbonates was developed. The linear allylictrifluoromethylthioethers were obtained in 52–91% yields. Mechanistic investigation revealed that this reaction proceeds via a double allylictrifluoromethylthiolation sequence.
Iridium‐Catalyzed Asymmetric Allylic Substitution of Methyl Azaarenes
作者:Xi‐Jia Liu、Wen‐Yun Zhang、Chao Zheng、Shu‐Li You
DOI:10.1002/anie.202200164
日期:2022.5.9
An iridium-catalyzedasymmetricallylic substitution of a variety of methyl azaarenes, including (benzo)thiazole, oxazole, benzoimidazole, pyridine, and (iso)quinoline, is described. The corresponding chiral azaarene derivatives are afforded in good yields with high enantioselectivity (up to 96 % yield and 99 % ee).
Sequential Catalytic Isomerization and Allylic Substitution. Conversion of Racemic Branched Allylic Carbonates to Enantioenriched Allylic Substitution Products
作者:Shashank Shekhar、Brian Trantow、Andreas Leitner、John F. Hartwig
DOI:10.1021/ja0644273
日期:2006.9.1
A catalytic protocol for the conversion of readily accessible racemic, branched aromatic allylic esters to branched allylic amines, ethers, and alkyls has been developed. Palladium-catalyzed isomerization of branched allylic esters to terminal allylic esters, followed by sequential iridium-catalyzed allylic substitution, gave the branched allylic products in good yield with high regioisomeric and enantiomeric
已经开发了一种用于将容易获得的外消旋、支链芳族烯丙酯转化为支链烯丙胺、醚和烷基的催化方案。钯催化的支链烯丙基酯异构化为末端烯丙基酯,然后依次进行铱催化的烯丙基取代,以良好的收率得到支链烯丙基产物,具有高区域异构和对映异构选择性。富电子和缺电子支化烯丙基酯均产生 >90% ee 的产物。对于来自乙酸2-噻吩酯和碳酸二烯酯的反应的产物,也观察到高对映体过量。