Studies on the synthesis and biosynthesis of the fungal alkaloid necatorone
摘要:
An alternative pathway for the biosynthesis of the fungal alkaloid necatorone has been studied using fluorine-labeled 3-(2-carboxyphenylamino)-L-tyrosine. Although no incorporation of this compound could be detected in feeding experiments with young specimens of Lactarius necator, an analogous 3-aminotyrosine derivative could be converted synthetically into the oxopyridoacridine core structure of necatorone. In experiments aimed at the synthesis of aaptamine-type alkaloids, an unprecedented cyclization of a 3-aminotyrosine-methyl propiolate adduct to a methyl isoquinoline-3-carboxylate was observed. A mechanism is proposed, in which C3 of the propiolate delivers C1 of the isoquinoline nucleus. (C) 2013 Elsevier Ltd. All rights reserved.
Brønsted-acid-catalyzed allylic substitution reactions of the in situ generated 3-hydroxy indanones with alcohols and sulfamides were investigated, which provided a facile route for the synthesis of a large variety of 3-alkoxy and 3-sulfamido indanones. The key intermediates, 3-hydroxy indanones, were obtained through the intramolecular Meyer–Schuster rearrangement of o-propargyl alcohol benzaldehydes. The resulting
[EN] HETEROAROMATIC MACROCYCLIC ETHER CHEMOTHERAPEUTIC AGENTS<br/>[FR] AGENTS CHIMIOTHÉRAPEUTIQUES À BASE D'ÉTHER MACROCYCLIQUE HÉTÉROAROMATIQUE
申请人:NUVALENT INC
公开号:WO2021226269A1
公开(公告)日:2021-11-11
Disclosed are heterocyclic heteroaromatic macrocyclic ether compounds, pharmaceutically acceptable salts of the compounds and pharmaceutical compositions thereof. Also disclosed are methods of treating or preventing cancer using the heterocyclic heteroaromatic macrocyclic ether compounds, pharmaceutically acceptable salts of the compounds, and pharmaceutical compositions thereof.
The synthesis of N-glycosylated quinolin-2-ones via an intramolecular N-arylation of glycosylamides is reported. The coupling involves the use of only Pd(OAc)2 as the catalyst and nBu4NOAc as the base in 1,4-dioxane. This versatile approach allows the synthesis of various N-glycosylated quinolin-2-ones with exclusive α or β selectivity.
据报道,通过糖基酰胺的分子内N-芳基化作用合成N-糖基化的喹啉-2-酮。偶联涉及在1,4-二恶烷中仅使用Pd(OAc)2作为催化剂,使用n Bu 4 NOAc作为碱。这种通用的方法可以合成具有独特的α或β选择性的各种N-糖基化的喹啉-2-酮。
F<sup>–</sup> Nucleophilic-Addition-Induced [3 + 2] Annulation: Direct Access to CF<sub>3</sub>-Substituted Indenes
of 1-(trifluoromethyl)-1H-indenes. The success of this strategy hinges upon a well-balanced process for the generation of two transient reactive species, specifically trifluoroethylsilver and alkenylpalladium intermediates, in the same molecule, as well as a smooth transmetalation step, which delicately joins together these two different metallic intermediates.
An efficient method for the synthesis of (E)-1H-inden-1-ones using gold-catalyzed tandem [3,3]-propargyl esterrearrangement followed by Michael addition under mild reaction conditions has been developed. The resulting products are important frameworks found in numerous natural products and pharmaceutically active compounds, as well as being valuable intermediates in organic synthesis.
已开发了一种有效的方法,该方法使用金催化的串联[3,3]-炔丙基酯重排,然后在温和的反应条件下进行迈克尔加成,来合成(E)-1 H -inden-1-one。所得产物是在许多天然产物和药物活性化合物中发现的重要构架,并且是有机合成中的有价值的中间体。