Metal-Free Dioxygenation of Enecarbamates Mediated by a Hypervalent Iodine Reagent
作者:Mathieu Bekkaye、Yingpeng Su、Géraldine Masson
DOI:10.1002/ejoc.201300501
日期:2013.7
A general method for the vicinal dioxygenation of enecarbamates was developed by using PhI(OAc)2 as the sole oxidant under extremely mild conditions, thus avoiding starting material decomposition. This methodology, which is an alternative to common dioxygenation processes catalyzed by transition metals, provides easy access to functionalized β-acetoxy-α-amido ethers and α-amido-β-oxytetrahydrofurans
Gold-Catalyzed Cascade Reaction of 2-Alkynyl Aryl Azides with Enecarbamates for Direct Synthesis of α-(3-Indolyl)ketones
作者:Jin-Ming Xie、Yun-Long Zhu、Yan-Ming Fu、Cheng-Feng Zhu、Lan-Jun Cheng、Yang-En You、Xiang Wu、You-Gui Li
DOI:10.1021/acs.orglett.2c04147
日期:2023.1.20
α-(3-Indolyl)ketones are essential building blocks for the generation of biologically active molecules. We described a new method for the direct assembly of α-(3-indolyl)ketones through the cascade reaction of 2-alkynyl aryl azides with enecarbamates, in which the in situ generated α-imino gold carbene intermediate was trapped by enecarbamate to achieve umpolung reactivity of indole at the 3-position
Thermoplastische Formmassen auf Basis von schlagzäh modifiziertem Polyamid und funktionalisiertem Polyphenylenäther
申请人:BASF Aktiengesellschaft
公开号:EP0387824A2
公开(公告)日:1990-09-19
Thermoplastische Formmassen, die frei von Cyanursäure oder Cyanursäurederivaten sind, enthaltend als wesentliche Komponenten
(A) 5 bis 95 Gew.% eines schlagzäh modifizierten Polyamids aus
a1) 70 bis 98 Gew.%, bezogen auf (A), eines Polyamids und
a2) 2 bis 30 Gew.%, bezogen auf (A), eines Emulsionspolymerisates, dessen Teilchen keine harte äußere Schale haben, und
(B) 5 bis 95 Gew.% eines funktionalisierten Polyphenylenethers,
deren Herstellung und Verwendung.
Cerium(IV) Ammonium Nitrate Mediated Three-Component α-Allylation of Imine Surrogates
作者:Mathieu Bekkaye、Géraldine Masson
DOI:10.1021/ol5004143
日期:2014.3.7
A general and practical CAN-mediated oxidative radical alpha-coupling reaction of various imine surrogates with allylsilanes has been described. This multicomponent process affords beta-allylated alpha-carbamido ethers as stable imine precursors in respectable yields under mild conditions.
Highly Enantioselective Intermolecular Iodo- and Chloroamination of Enecarbamates Catalyzed by Chiral Phosphoric Acids or Calcium Phosphate Salts
Highly enantio- and diastereoselective vicinal chloro- and iodoamination reaction of enecarbamates catalyzed by chiral phosphoric acids or chiral calcium organophosphates are reported. The approach described herein provides efficient access to cis-chloro and cis-iodoaminals in good yields and excellent enantioselectivities (up to 99% ee). The resulting products are converted readily into highly important trans-azidoaminals.