Disclosed herein are KCNQ potassium channels modulators of formula (I)
wherein ring Z
1
, R
1
, p, R
3
, and R
4
are as defined in the specification. Compositions comprising such compounds; and methods for treating conditions and disorders using such compounds and compositions are also described.
Palladium(II)‐Catalyzed Intermolecular Cascade Cyclization of Methylenecyclopropanes with Aromatic Alkynes: Construction of Spirocyclic Compounds Containing Indene and 1,2‐Dihydronaphthalene Moieties
作者:Wei Fang、Yin Wei、Min Shi
DOI:10.1002/adsc.201900327
日期:2019.7.11
A palladium(II)‐catalyzed intermolecular cascade cyclization of methylenecyclopropanes with aromatic alkynes is reported in this paper. The reaction involves a migratory insertion of alkyne, an intramolecular Heck‐type reaction, and β‐H elimination, providing a series of spirocyclic compounds containing indene and 1,2‐dihydronaphthalene moieties in moderate to excellent yields upon heating.
ortho-Carbonylarylacetylenols have been employed for the synthesis of dihydronaphthofurans via AgTFA-catalyzed annulation reaction. A broad range of substrates both ortho-keto- and ortho-formylarylacetylenols could be employed in this transformation providing the desired products in good yields. However, the reaction pathways of these two substrates are different. The reaction of the ketone precursors could directly
Chiral Silver Phosphate Catalyzed Transformation of<i>ortho</i>-Alkynylaryl Ketones into 1<i>H</i>-Isochromene Derivatives through an Intramolecular-Cyclization/Enantioselective-Reduction Sequence
作者:Masahiro Terada、Feng Li、Yasunori Toda
DOI:10.1002/anie.201307371
日期:2014.1.3
The transformation of ortho‐alkynylaryl ketones through a cyclization/enantioselective‐reduction sequence in the presence of a chiral silver phosphate catalyst afforded 1H‐isochromene derivatives in high yield with fairly good to high enantioselectivity. An asymmetric synthesis of the 9‐oxabicyclo[3.3.1]nona‐2,6‐diene framework, which has been found in some biologically active molecules, is presented
The use of a chiral (NCP)Ir complex as the precatalyst allowed for the discovery of asymmetrictransferhydrogenation of diaryl ketones with ethanol as the hydrogen source and solvent. This reaction was applicable to various ortho-substituted diaryl keontes, affording benzhydrols in good yields and enantioselectivities. This protocol could be carried out in a gram scale under mild reaction conditions
使用手性 (NCP)Ir 配合物作为预催化剂,可以发现以乙醇为氢源和溶剂的二芳基酮的不对称转移氢化。该反应适用于各种邻位取代的二芳基酮,以良好的收率和对映选择性提供苯甲醇。该方案可以在温和的反应条件下以克级进行。通过合成 ( S )-新苯诺定的关键前体突出了催化体系的实用性。