Further optimization of the M5 NAM MLPCN probe ML375: Tactics and challenges
摘要:
This Letter describes the continued optimization of the MLPCN probe ML375, a highly selective M-5 negative allosteric modulator (NAM), through a combination of matrix libraries and iterative parallel synthesis. True to certain allosteric ligands, SAR was shallow, and the matrix library approach highlighted the challenges with M-5 NAM SAR within in this chemotype. Once again, enantiospecific activity was noted, and potency at rat and human M-5 were improved over ML375, along with slight enhancement in physiochemical properties, certain in vitro DMPK parameters and CNS distribution. Attempts to further enhance pharmacokinetics with deuterium incorporation afforded mixed results, but pretreatment with a pan-P450 inhibitor (1-aminobenzotriazole; ABT) provided increased plasma exposure. (C) 2014 Elsevier Ltd. All rights reserved.
An efficient N-centered radical intramolecular cyclizationreaction of alkenyl amides induced by visible light was described. In this process, an alkenyl amide underwent 5-exo/6-endo cyclization to selectively yield two critical alkaloid structures, namely isoindolinones and isoquinolinones.
Copper-Mediated/Catalyzed Oxyalkylation of Alkenes with Alkylnitriles
作者:Ala Bunescu、Qian Wang、Jieping Zhu
DOI:10.1002/chem.201405102
日期:2014.11.3
A copper‐promoted oxyalkylation of alkenes with alkylnitriles has been developed. The protocol provides rapid access to phthalides (γ‐lactones) or isochromanones (δ‐lactones) via the formation of a C(sp3)C(sp3) and a C(sp3)O bond with the generation of up to two quaternary carbon atoms. Mechanistic studies suggest that this reaction is initiated by the formation of the C(sp3)C(sp3) bond rather than
The synthesis of shihunine and related compounds from ortho-carboxyphenyl cyclopropyl ketone
作者:E. Breuer、S. Zbaida
DOI:10.1016/0040-4020(75)85019-8
日期:1975.1
Reaction of dicyclopropyl cadmium and phthalic acid monochloride monomethyl ester gives o-carboxyphenyl cyclopropylketone (2). Reaction of the methyl ester of 2 with methylamine gives 2 - methyl - 3 - hydroxy-3-cyclopropyl-1-isoindolinone (4b), which is converted by hydrogen halides in chloroform to the rearranged homoallylic halides 5a–c. Thionyl chloride in chloroform converts 2 to 3-(3-chloropropylidene)
Isoquinolinone is an important heterocyclic framework in natural products and biologically active molecules, and the efficient synthesis of this structural motif has received much attention in recent years. Herein, we report a (phenyliodonio)sulfamate (PISA)-mediated, solvent-dependent synthesis of different isoquinolinone derivatives. The method provides highly chemoselective access to 3- or 4-substituted isoquinolinone
抽象的 异喹啉酮是天然产物和生物活性分子中重要的杂环骨架,该结构基序的高效合成近年来备受关注。在此,我们报告了(苯基碘)氨基磺酸盐(PISA)介导的、溶剂依赖性的不同异喹啉酮衍生物的合成。该方法通过使邻链烯基苯甲酰胺衍生物与PISA在乙腈或湿六氟-2-异丙醇中反应,提供对3-或4-取代的异喹啉酮衍生物的高度化学选择性的获得。 Beilstein J. Org. Chem. 2024, 20, 1914–1921. doi:10.3762/bjoc.20.167