Metal-Free Direct C-H β-Carbonyl Alkylation of Heteroarenes with Cyclopropanols Mediated by K<sub>2</sub>
S<sub>2</sub>
O<sub>8</sub>
作者:Qiang Liu、Qiang Wang、Guanqun Xie、Zeyang Fang、Shujiang Ding、Xiaoxia Wang
DOI:10.1002/ejoc.202000289
日期:2020.5.10
direct C–H β‐carbonyl alkylation of heteroarenes has been achieved through K2S2O8‐mediated ring‐opening of cyclopropanols. A wide scope of substrates, such as various substituted quinolines and isoquinolines, pyridines, pyridazine, benzo[d]thiazole, and phenanthroline, underwent the β‐carbonyl alkylation efficiently and afforded the β‐heteroarylated ketones in moderate to excellent yields.
[EN] MUSCARINIC ACETYLCHOLINE M1 RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DES RÉCEPTEURS MUSCARINIQUES DE L'ACÉTYLCHOLINE M1
申请人:PIPELINE THERAPEUTICS INC
公开号:WO2021071843A1
公开(公告)日:2021-04-15
Provided herein, inter alia, are compounds which are useful as antagonists of the muscarinic acetylcholine receptor M1 (mAChR M1); synthetic methods for making the compounds; pharmaceutical compositions comprising the compounds; and methods of treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction using the compounds and compositions.
Cobalt-Catalyzed Regio- and Diastereoselective Formal [3 + 2] Cycloaddition between Cyclopropanols and Allenes
作者:Junfeng Yang、Qiao Sun、Naohiko Yoshikai
DOI:10.1021/acscatal.8b05114
日期:2019.3.1
reaction between a cyclopropanol and an allene viacyclopropanol ring opening, which affords a 3-alkylidenecyclopentanol derivative with high regio- and diastereoselectivities. The reaction tolerates monosubstituted, 1,1-disubstituted, and 1,3-disubstituted allenes and various functional groups. The reaction is proposed to proceed through carbometalation of the allene with a cobalt homoenolate followed by
Catalytic Asymmetric Allylic Substitution with Copper(I) Homoenolates Generated from Cyclopropanols
作者:Qi Zhang、Si‐Wei Zhou、Chang‐Yun Shi、Liang Yin
DOI:10.1002/anie.202110709
日期:2021.12.6
A catalytic asymmetricallylicsubstitution with NHC-stabilized copper(I) homoenolates generated from cyclopropanols is developed that affords γ-chiral ketones in excellent regio- and high enantioselectivities. This process enables the generation of chiral quaternary carbon centers and features a broad substrate scope.
Rh-Catalyzed cascade C–H activation/C–C cleavage/cyclization of carboxylic acids with cyclopropanols
作者:Siqi Wang、Erfei Miao、Hao Wang、Bichao Song、Wei Huang、Weibo Yang
DOI:10.1039/d1cc01778k
日期:——
Merging both C–H and C–C activation in a tandemprocess is a marked challenge. A novel Rh(III)-catalyzed C–H activation/ring opening C–C cleavage/cyclization of carboxylic acids with cyclopropanols was developed for the synthesis of 3-substituted phthalides and α,β-butenolides. This reaction displays excellent functional group tolerance with respect to both carboxylic acids and cyclopropanols and features