Synthesis of the antibiotically active part of agrocin 84
摘要:
Phosphitylation of bis-O-silylated threo-2,3-dihydroxy-4-methylpentanamide and condensation of the resulting N-acylphosphorodiamidite with 2'-O-acetyl-3'-deoxyarabinoadenosine led, after oxidation and deprotection, to the isolation of the title compound. (C) 1998 Elsevier Science Ltd. Ail rights reserved.
Stereoselective Synthesis of Polysubstituted Alkenes through a Phosphine-Mediated Three-Component System of Aldehydes, α-Halo Carbonyl Compounds, and Terminal Alkenes
作者:Da-Neng Liu、Shi-Kai Tian
DOI:10.1002/chem.200900177
日期:2009.4.27
mediate the one‐pot Wittig reaction of aldehydes with α‐halo carbonylcompounds for the synthesis of 1,2‐disubstituted and trisubstituted alkenes in an excellent stereoselective fashion. Furthermore, the first one‐pot, three‐component reaction of aldehydes, α‐halo acetates, and terminalalkenes has been developed in the presence of PPh3 to produce trisubstituted alkenes with excellent E selectivity (see
A Simple One-pot Organometallic Formylation/Trapping Sequence Using<i>N</i>-Formylcarbazole
作者:Darren J. Dixon、Amanda C. Lucas
DOI:10.1055/s-2004-822896
日期:——
Treatment of a range of sp3-, sp2- and sp-nucleophiles with N-formyl carbazole leads to the formation of the metastable anionic carbazole carbinols. In the presence of a second nucleophilic reagent such as phosphonoacetate or an organolithium, these collapse on warming to the aldehyde which is trapped in situ to afford the α,β-unsaturated esters or secondary carbinols respectively.
The disclosure features macrocyclic compounds, and pharmaceutical compositions and protein complexes thereof, capable of inhibiting Ras proteins, and their uses in the treatment of cancers.
[EN] COVALENT RAS INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE RAS COVALENTS ET LEURS UTILISATIONS
申请人:REVOLUTION MEDICINES INC
公开号:WO2021108683A1
公开(公告)日:2021-06-03
The disclosure features compounds, or pharmaceutically acceptable salts thereof, alone and in combination with other therapeutic agents, pharmaceutical compositions, and protein conjugates thereof, capable of modulating biological processes including Ras, and their uses in the treatment of cancers.
A Novel and Efficient Method for the Preparation of α-Hydroxyimino Carbonyl Compounds from α,β-Unsaturated Carbonyl Compounds with Butyl Nitrite and Phenylsilane Catalyzed by a Cobalt(II) Complex
作者:Koji Kato、Teruaki Mukaiyama
DOI:10.1246/bcsj.64.2948
日期:1991.10
Various α,β-unsaturated carbonylcompounds, such as α,β-unsaturated esters, α,β-unsaturated ketones, α,β-unsaturated nitriles, and α,β-unsaturated amides, were directly converted to the corresponding a-hydroxyimino carbonylcompounds in high yields on treatment with butyl nitrite and phenylsilane in the presence of a catalytic amount of N,N′-bis(2-ethoxycarbonyl-3-oxobutylidene)ethylenediaminatocobalt(II)
α,β-不饱和酯、α,β-不饱和酮、α,β-不饱和腈、α,β-不饱和酰胺等多种α,β-不饱和羰基化合物直接转化为相应的α-羟基亚氨基羰基在温和条件下,在催化量的 N,N'-双(2-乙氧基羰基-3-氧代丁二烯)乙二氨基钴 (II) 配合物存在下,用亚硝酸丁酯和苯基硅烷处理高产率的化合物。