Hydrosilylation-Promoted Furan Diels–Alder Cycloadditions with Stereoselectivity Controlled by the Silyl Group
作者:Zhi-Yun Liu、Ming Zhang、Xiao-Chen Wang
DOI:10.1021/jacs.9b11909
日期:2020.1.8
unprecedented B(C6F5)3-catalyzed cascade reaction of N-allyl-N-furfurylamides involving an initial intramolecularfuranDiels-Alderreaction and subsequent ether cleavage. The reaction has a broad substrate scope, even tolerating a trialkyl-substituted olefin as the dienophile, which has not previously been observed with conventional furanDiels-Alderreactions. In addition, the relative configuration
Dual Palladium(II)/Tertiary Amine Catalysis for Asymmetric Regioselective Rearrangements of Allylic Carbamates
作者:Johannes Moritz Bauer、Wolfgang Frey、René Peters
DOI:10.1002/chem.201600138
日期:2016.4.11
access to enantiopure allylicamines as valuable precursors towards chiral β‐ and γ‐aminoalcohols as well as α‐ and β‐aminoacids is desirable for industrial purposes. In this article an enantioselective method is described that transforms achiral allylic alcohols and N‐tosylisocyanate in a single step into highly enantioenriched N‐tosyl protected allylicamines via an allylic carbamate intermediate
A one-pot “back-to-front” approach for the synthesis of benzene ring substituted indoles using allylboronic acids
作者:Ganesh Karan、Samrat Sahu、Modhu Sudan Maji
DOI:10.1039/d1cc01512e
日期:——
Synthesis of only benzene ring functionalized indoles and poly-substituted carbazoles is reported via a one-pot triple cascade benzannulation protocol. Usage of differently substituted and readily accessible allylboronic acids as a 3-carbon annulating partner enables diverse aliphatic and aromatic substitution patterns, which is still a daunting task. This scalable synthetic protocol tolerates broad
Stereoselective Synthesis of Quaternary Carbons via the Dianionic Ireland–Claisen Rearrangement
作者:Michael T. Crimmins、John D. Knight、Philip S. Williams、Yan Zhang
DOI:10.1021/ol5008422
日期:2014.5.2
α-methyl-β-hydroxy allylic esters has been developed that proceeds with high diastereoselectivity and provides products containing three contiguous stereogenic carbons, including a quaternary center. The potential utility of the rearrangement for complex molecule synthesis is also demonstrated.
Asymmetric Cascade Reaction to Allylic Sulfonamides from Allylic Alcohols by Palladium(II)/Base-Catalyzed Rearrangement of Allylic Carbamates
作者:Johannes Moritz Bauer、Wolfgang Frey、René Peters
DOI:10.1002/anie.201403090
日期:2014.7.14
accessible achiral allylic alcohols into chiral sulfonyl‐protected allylic amines. The reaction is catalyzed by the cooperative action of a chiral ferrocene palladacycle and a tertiary amine base and combines high step‐economy with operational simplicity (e.g. no need for inert‐gas atmosphere or catalyst activation). Mechanistic studies support a PdII‐catalyzed [3,3] rearrangement of allylic carbamates—generated