Tandem Suzuki-Miyaura Coupling/Acid-Catalyzed Cyclization between Vinyl Ether Boronates and Vinyl Halides: A Concise Approach to Polysubstituted Furans
摘要:
Polysubstituted 2-(omega-hydroxyalkyl)furans were prepared by tandem Suzuki-Miyaura coupling/acid-catalyzed cyclization starting from appropriately substituted 3-haloallylic alcohols and dihydrofuran-, dihydropyran- or glycal-derived pinacol boronates.
[EN] PYRIMIDINE JAK INHIBITORS FOR THE TREATMENT OF SKIN DISEASES<br/>[FR] INHIBITEURS DE JAK À BASE DE PYRIMIDINE POUR LE TRAITEMENT DE MALADIES DE LA PEAU
申请人:THERAVANCE BIOPHARMA R&D IP LLC
公开号:WO2020219640A1
公开(公告)日:2020-10-29
The invention provides compounds of formula (I): or pharmaceutically-acceptable salts thereof, that are inhibitors of Janus kinases. The invention also provides pharmaceutical compositions comprising such compounds, and methods of using such compounds to treat inflammatory and autoimmune skin diseases.
The present invention discloses compounds of Formula (I), and pharmaceutically acceptable salts thereof:
which inhibit the protein(s) encoded by hepatitis B virus (HBV) or interfere with the function of the HBV life cycle of the hepatitis B virus and are also useful as antiviral agents. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject suffering from HBV infection. The invention also relates to methods of treating an HBV infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention.
An improved route to 19-substituted geldanamycins as novel Hsp90 inhibitors – potential therapeutics in cancer and neurodegeneration
作者:Russell R. A. Kitson、Christopher J. Moody
DOI:10.1039/c3cc43457e
日期:——
19-Substituted geldanamycin derivatives are efficient Hsp90 inhibitors, without the toxicity associated with the other benzoquinone ansamycins, thus giving them potential for use as molecular therapeutics in cancer and neurodegeneration. Here a new method of synthesising these important compounds is reported, eliminating the need for toxic metals and metalloids.
resulting 19-substituted derivatives have greater potential for success in oncology clinical trials and for other medicinal purposes such as the treatment of neurodegenerative conditions. Having overcome hurdles associated with the sensitivity and complexity of these molecules, through a variety of synthetic approaches, the synthesis of a series of 19-substituted geldanamycin derivatives is reported herein
Vinylic C–H borylation of cyclic vinyl ethers by bis(pinacolato)diboron was effectively catalyzed by iridium complexes comprised of 1/2[Ir(OMe)(cod)]2 and 4,4′-di-tert-butyl-2,2′-bipyridine in hexane or octane to give the corresponding vinylboron compounds in good yields. The reaction of 1,4-dioxene occurred even at room temperature, whereas the reactions of dihydropyran and dihydrofuran derivatives required a temperature above 80 °C. Although dihydropyran and dihydrofuran themselves produced regioisomeric mixtures of α- and β-borylated products, similar substrates possessing substituents at the γ-position selectively underwent borylation at the α-position.
由 1/2[Ir(OMe)(cod)]2 和 4,4′-二叔丁基-2,2′-联吡啶组成的铱配合物在己烷或辛烷中有效催化了双(频哪醇)二硼酸环乙烯基醚的乙烯基 C-H 硼酸化反应,从而以良好的收率得到了相应的乙烯基硼化合物。1,4-dioxene 的反应甚至可以在室温下进行,而二氢吡喃和二氢呋喃衍生物的反应则需要 80 °C 以上的温度。虽然二氢吡喃和二氢呋喃本身会产生α-和β-硼化产物的区域异构混合物,但在γ-位上具有取代基的类似底物会选择性地在α-位上发生硼化反应。