Copper-Catalyzed Four-Component Reaction of Baylis-Hillman Adducts with Alkynes, Sulfonyl Azides and Alcohols
作者:Wangze Song、Ming Lei、Yang Shen、Shuying Cai、Wei Lu、Ping Lu、Yanguang Wang
DOI:10.1002/adsc.201000400
日期:2010.10.4
4-(Alkoxycarbonyl)-pent-4-enimidates were regioselectively synthesized via a copper-catalyzed four-component reaction of Baylis–Hillman adducts with terminal alkynes, sulfonylazides and alcohols. The procedure is concise, general and efficient. The resulting pentenimidates could be further transformed to 3-methylene-2,3-dihydroindene-1-imidates.
Enantioselective [4 + 1]-Annulation of α,β-Unsaturated Imines with Allylic Carbonates Catalyzed by a Hybrid <i>P</i>-Chiral Phosphine Oxide–Phosphine
作者:Hanyuan Li、Jiesi Luo、Bojuan Li、Xizhen Yi、Zhengjie He
DOI:10.1021/acs.orglett.7b02800
日期:2017.10.20
A highly enantio- and diastereoselective [4 + 1]-annulation reaction between α,β-unsaturated imines and allylic carbonates has been realized under the catalysis of a novel hybrid P-chiral phosphine oxide–phosphine, providing enantioenriched polysubstituted 2-pyrrolines in good to excellent yields and up to 99% ee. Based on Han’s methods, the catalyst featuring a sole P(O)-chirality in the molecule
Stereoselective synthesis of organosulfur compounds incorporating N-aromatic heterocyclic motifs and quaternary carbon centers via a sulfa-Michael triggered tandem reaction
The novel sulfa-Michael addition (SMA)-triggered tandem reaction was developed by combining a SMA reaction with a simultaneous rearomatization process.
Catalyst‐Controlled Regiodivergent Synthesis of α/β‐Dipeptide Derivatives via
<i>N</i>
‐Allylic Alkylation of
<i>O‐</i>
Alkyl Hydroxamates with MBH Carbonates
A catalyst-controlled switchable N-allylic reaction of O-alkyl hydroxamates with MBH carbonates is reported, providing a regiodivergent method for α/β-dipeptides derivatives.
Enantioselective Conversion of Primary Alcohols to α-<i>exo</i>-Methylene γ-Butyrolactones via Iridium-Catalyzed C–C Bond-Forming Transfer Hydrogenation: 2-(Alkoxycarbonyl)allylation
作者:T. Patrick Montgomery、Abbas Hassan、Boyoung Y. Park、Michael J. Krische
DOI:10.1021/ja303839h
日期:2012.7.11
Upon exposure of acrylic ester 1 to alcohols 2a-i in the presence of a cyclometalated iridium catalyst modified by (-)-TMBTP, catalytic C-C coupling occurs, providing enantiomerically enriched 5-substituted α-exo-methylene γ-butyrolactones 3a-i. Bromination of the methylene butyrolactone products followed by zinc-mediated reductive aldehyde addition provides the disubstituted α-exo-methylene γ-butyrolactones