Highly Enantioselective, Base-Free Synthesis of α-Quaternary Succinimides through Catalytic Asymmetric Allylic Alkylation
作者:Tao Song、Stellios Arseniyadis、Janine Cossy
DOI:10.1002/chem.201800920
日期:2018.6.7
The synthesis of diversely substituted five‐membered ring succinimide derivatives is reported featuring a direct, base‐free, palladium‐catalyzed asymmetric allylicalkylation. The method allows a straightforward access to the desired heterocyclic scaffold bearing an all‐carbon α‐quaternary stereogenic center in high yields and good to excellent enantioselectivities. To further demonstrate the synthetic
Palladium-Catalyzed Asymmetric Allylic Alkylation of 4-Substituted Isoxazolidin-5-ones: Straightforward Access to β<sup>2,2</sup>
-Amino Acids
作者:Marllon Nascimento de Oliveira、Stellios Arseniyadis、Janine Cossy
DOI:10.1002/chem.201800641
日期:2018.4.3
We report here an unprecedented and highly enantioselective palladium‐catalyzed allylic alkylation applied to 4‐substituted isoxazolidin‐5‐ones. Ultimately, the process provides a straightforwardaccess to β2,2‐amino acids bearing an all‐carbon quaternary stereogenic center in great yields and a high degree of enantioselectivity.
Alkyl Halide-Free Heteroatom Alkylation and Epoxidation Facilitated by a Recyclable Polymer-Supported Oxidant for the In-Flow Preparation of Diazo Compounds
作者:Simon M. Nicolle、Christopher J. Hayes、Christopher J. Moody
DOI:10.1002/chem.201500118
日期:2015.3.16
simple ketones via diazocompounds, including diazo‐amides and ‐phosphonates, using a recyclable reagent in‐flow, are transient but versatile electrophiles for heteroatomalkylation reactions and for epoxide formation. The method produces no organic waste, with the only by‐products being water, KI and nitrogen, without the attendant hazards of isolation of intermediate diazocompounds.
Sequential Palladium-Catalyzed Allylic Alkylation/retro-Dieckmann Fragmentation Strategy for the Synthesis of α-Substituted Acrylonitriles
作者:Tania Katsina、Sachi Prem Sharma、Roberto Buccafusca、Derek J. Quinn、Thomas S. Moody、Stellios Arseniyadis
DOI:10.1021/acs.orglett.9b03522
日期:2019.12.6
A straightforward synthesis of α-substituted acrylonitriles is described using 4-cyano-3-oxotetrahydro-thiophene (c-THT) as an acrylonitrile surrogate. This unprecedented two-step sequence featuring a palladium-catalyzed allylic alkylation (Pd-AA) and a retro-Dieckmann fragmentation provides a general entry into diversely substituted 1,4-dienes.
[EN] COMPOSITIONS AND METHODS FOR PROTEIN LABELING, MODIFICATION, ANALYSIS, AND TARGETED DELIVERY<br/>[FR] COMPOSITIONS ET PROCÉDÉS POUR LE MARQUAGE, LA MODIFICATION, L'ANALYSE ET LA DÉLIVRANCE CIBLÉE DE PROTÉINES
申请人:UNIV MASSACHUSETTS
公开号:WO2020006340A1
公开(公告)日:2020-01-02
The invention relates to chemically reactive and/or biologically active compounds, reagents and compositions thereof. More particularly, the invention provides novel reagents that are useful in chemical synthesis, functionalization, delivery, probing and/or analytical measurements of small molecule drugs, proteins, antibodies and other biomolecules. The invention provides novel biologically active agents useful as diagnostics or therapeutics, and related composition and methods of uses thereof.