Rhodium-Catalyzed Regio- and Enantioselective Addition of <i>N</i>-Hydroxyphthalimide to Allenes: A Strategy To Synthesize Chiral Allylic Alcohols
作者:Zi Liu、Bernhard Breit
DOI:10.1021/acs.orglett.7b03709
日期:2018.1.5
We achieved the first Rh-catalyzed regio- and enantioselectiveadditions of N-hydroxyphthalimide to allenes. This transformation is accomplished via mild reaction conditions, leveraging on Josiphos SL-J003-2 as a chiral ligand to furnish branched O-allyl compounds in good yields with moderate to excellent enantioselectivities. The substrate scope is broad, and various functional groups are tolerated
Totalsynthesis of debromoflustramines B and E has been accomplished by using a platinum-catalyzed addition reaction of o-aminophenylboronic acid with the allene and an intramolecular carbamoylketene–alkene [2 + 2] cycloaddition for the construction of the basic carbon framework of the target alkaloids as the key steps.
Copper-Catalyzed Hydroalumination of Allenes with Diisobutylaluminum Hydride: Synthesis of Allylic Ketones with α-Quaternary Centers via Tandem Allylation/Oppenauer Oxidation
作者:Sangback Lee、Sanghyun Lee、Yunmi Lee
DOI:10.1021/acs.orglett.0c01876
日期:2020.8.7
straightforward approach to allylaluminum reagent synthesis through Cu-catalyzed hydroalumination of readily accessible allenes with diisobutylaluminum hydride is described. The N-heterocyclic carbene-based copper complex promotes hydride addition to various functionalized allenes under mild reaction conditions. The catalytic reaction is applied to a highlyselective one-pot synthesis of allylic ketones
Copper-Catalyzed Enantioselective Borylative Allyl–Allyl Coupling of Allenes and Allylic <i>gem</i>-Dichlorides
作者:Martín Piñeiro-Suárez、Andrés M. Álvarez-Constantino、Martín Fañanás-Mastral
DOI:10.1021/acscatal.3c00536
日期:2023.4.21
alkenyl chloride units with high levels of chemo-, regio-, enantio-, and diastereoselectivity. The synthetic utility of the products is demonstrated with the synthesis of a range of optically active compounds. DFT calculations reveal key noncovalent substrate–ligand interactions that account for the enantioselectivity outcome and the diastereoselective formation of the (Z)-alkenyl chloride.
报道了丙二烯、双(频哪醇)二硼和烯丙基宝石-二氯化物之间的催化不对称反应。该方法涉及催化生成的烯丙基铜物种与烯丙基宝石-二氯化物的偶联,并提供手性内部 1,5-二烯,具有 ( Z )-构型的烯基硼酸酯和烯基氯单元,具有高水平的化学-、区域-、对映体-,和非对映选择性。通过一系列光学活性化合物的合成证明了产品的合成效用。DFT 计算揭示了关键的非共价底物-配体相互作用,这些相互作用解释了 ( Z )-烯基氯的对映选择性结果和非对映选择性形成。
Rhenium-Catalyzed Diastereoselective Synthesis of Aminoindanes via the Insertion of Allenes into a C−H Bond
作者:Yoichiro Kuninobu、Peng Yu、Kazuhiko Takai
DOI:10.1021/ol101627x
日期:2010.10.1
Aminoindane derivatives were synthesized diastereoselectively by the treatment of aromatic imines with allenes in the presence of a catalytic amount of a rhenium complex, [HRe(CO)(4)](n). The allenes inserted into the aromatic C-H bonds.