centered around ring-opening carbon–carbon bond cleavage/fluorination of strained cycloalkanols, either using precious silver catalysis or superstoichiometric ceric ammonium nitrate (CAN). Careful study of these methods has allowed us to design and develop a general Earth-abundant-element-catalyzed method for remotely fluorinated ketone synthesis via C–C bond cleavage. Critically, the use of manganese
Rapid and scalable synthesis of fluoroketones <i>via</i> cerium-mediated C–C bond cleavage
作者:Yen-Chu Lu、Helen M. Jordan、Julian G. West
DOI:10.1039/d0cc08183c
日期:——
Ketones with remote fluorination are an important motif in the synthesis of bioactive molecules. Here we demonstrate that ceric ammonium nitrate (CAN) is able to produce this functionality under incredibly mild conditions and short reaction times (30 min) while eliminating the need for precious metals in previous methods. Importantly, this method allows the efficient synthesis of a wide variety of
[EN] HYDROXY ISOXAZOLE COMPOUNDS USEFUL AS GPR120 AGONISTS<br/>[FR] COMPOSÉS D'HYDROXY ISOXAZOLE UTILES EN TANT QU'AGONISTES DE GPR120
申请人:MERCK SHARP & DOHME
公开号:WO2018107415A1
公开(公告)日:2018-06-21
The present invention relates to a compound represented by formula (I) : and pharmaceutically acceptable salts thereof are disclosed as useful for treating or preventing diabetes, hyperlipidemia, obesity, NASH, inflammation related disorders, and related diseases and conditions. The compounds are useful as agonists of the G-protein coupled receptor GPR120. Pharmaceutical compositions and methods of treatment are also included.
TFA‐Catalyzed [3+2] Spiroannulation of Cyclobutanols: A Route to Spiro[cyclobuta[
<i>a</i>
]indene‐7,1′‐cyclobutane] Skeletons
作者:Zhenyu An、Yafeng Liu、Yanwei Sun、Rulong Yan
DOI:10.1002/asia.202001048
日期:2020.11.16
A straightforward method for the synthesis of spiro[cyclobuta[a]indene‐7,1′‐cyclobutane] derivatives from cyclobutanols has been developed viaone‐pot [3+2] spiroannulation. A series of new spiro[cyclobuta[a]indene‐7,1′‐cyclobutane] derivatives are facilely synthesized in good yields under mildreaction conditions.
一种通过单锅[3 + 2]螺环合成法开发了一种从环丁醇合成螺[cyclobuta [ a ] indene-7,1'-cyclobutane]衍生物的简单方法。在温和的反应条件下,以高收率容易地合成了一系列新的螺[cyclobuta [ a ] indene-7,1'-cyclobutane]衍生物。
Metal-Free C–S Bond Formation in Elemental Sulfur and Cyclobutanol Derivatives: The Synthesis of Substituted Thiophenes
作者:Mingzhong Wu、Chaoxian Yan、Daijiao Zhuang、Rulong Yan
DOI:10.1021/acs.orglett.2c01907
日期:2022.7.29
A general approach for the metal-free synthesis of thiophenes by tert-cyclobutanols and elementalsulfur has been developed. This protocol provides a strategy for constructing multisubstituted thiophene derivatives via C–S bond formation under air. This reaction shows good functionality tolerance under the reaction conditions, and the mechanism is validated by control experiments and density functional