Redox‐Neutral Manganese(I)‐Catalyzed C−H Activation: Traceless Directing Group Enabled Regioselective Annulation
作者:Qingquan Lu、Steffen Greßies、Sara Cembellín、Felix J. R. Klauck、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.201707396
日期:2017.10.2
groups (TDGs) are used to promote the redox‐neutral MnI‐catalyzed regioselectivesynthesis of N‐heterocycles. Alkyne coupling partners bearing a traceless directing group, which serves as both the chelator and internal oxidant, were used to control the regioselectivity of the annulation reactions. This operationally simple approach is highly effective with previously challenging unsymmetrical alkyne
A new and highly efficient catalytic system based on CpRuClL2 is proposed for the S-propargylation of thiols by propargylic carbonates under neutral conditions, in which specific requirements inherent to the different reactivities of aliphatic and aromatic thiols are achieved by tuning both the nature of the ancillary ligand L and the experimental conditions.
A palladium-catalyzed synthesis of 2-alkylidene-pyrrolo[c]-1,4-dioxanes: synthesis of 3,4-(cis-1,2-dimethyl)ethylenedioxypyrrole
作者:Kyukwan Zong、Khalil A Abboud、John R Reynolds
DOI:10.1016/j.tetlet.2004.04.042
日期:2004.6
Palladium-catalyzed cyclization of ethyl-1-benzyl-3.4-dihydroxypyrrole-2,5-dicarboxylate with various propargylic carbonates rendered 2-alkylidenepyrrolo[c]-1,4-dioxane derivatives with excellent yields. Further chemical manipulations of a selected compound led to 3.4-(cis-1,2-dimethyl)ethylenedioxypyrrole in good yield. (C) 2004 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed Regioselective Bis-Alkynylation of Propargylic Carbonates: Synthesis of Enediyne Compounds
作者:Minoru Hayashi、Kazuhiko Saigo
DOI:10.1016/s0040-4039(97)01435-4
日期:1997.9
Conjugated enediyne compounds were synthesized by the palladium-catalyzed bis-alkynylation reaction of propargylic carbonates with terminal alkynes. An unsymmetric enediyne was also synthesized by successive addition of two different alkynes. (C) 1997 Elsevier Science Ltd.
[EN] ELECTRODE AND ELECTROCHEMICAL DEVICE<br/>[FR] ÉLECTRODE ET DISPOSITIF ÉLECTROCHIMIQUE<br/>[JA] 電極および電気化学デバイス