The present invention relates to a compound represented by a formula (I): wherein X is a group represented by or the like; Y is a group represented by or the like; and Ar1 is a group represented by or a pharmaceutically acceptable salt thereof.
Catalytic Enantioselective Addition of Pyrazol-5-ones to Trisubstituted Nitroalkenes with an <i>N</i>
-Sulfinylurea Organocatalyst
作者:James P. Phelan、Jonathan A. Ellman
DOI:10.1002/adsc.201600110
日期:2016.6.2
The first example of enantioselective nitronate protonation following Michaeladdition of a carbon nucleophile to an α,β,β‐trisubstituted nitroalkene is reported. An N‐sulfinylurea catalyst was employed to catalyze the addition of a variety of 3‐substituted pyrazol‐5‐one nucleophiles to trisubstituted nitroalkenes incorporating an oxetane or azetidine ring at the β‐position. The nitroalkane‐pyrazolone
Catalytic enantioselective synthesis of chiral 4-hydroxy 4′-substituted pyrazolones by the vinylogous aldol reaction of pyrazole-4,5-diones with 3-alkylidene-2-oxindoles
作者:Krishna Kumar、Bhuvnesh Singh、Soumyadip Hore、Ravi P Singh
DOI:10.1039/d0nj05886f
日期:——
Here, a bifunctional quinine-derived benzamide catalyzed directenantioselective vinylogous aldol reaction between 3-alkylidene-2-oxindoles and pyrazole-4,5-diones has been developed. This challenging protocol has been achieved via the H-bonding dual activation mode of the catalyst. Highly functional rich pyrazolone moieties having an oxindole core have been obtained with an excellent E/Z (>19 : 1)
在这里,已经开发了一种双功能奎宁衍生的苯甲酰胺催化 3-亚烷基-2-羟吲哚和吡唑-4,5-二酮之间的直接对映选择性乙烯基醛醇反应。这一具有挑战性的协议是通过催化剂的 H 键双激活模式实现的。已获得具有 oxindole 核心的高功能性丰富吡唑啉酮部分,其E / Z (>19:1) 和高产率以及中等对映选择性。
HETEROARYLTHIOMETHYL PYRIDINE DERIVATIVE
申请人:Kameda Minoru
公开号:US20120028970A1
公开(公告)日:2012-02-02
The present invention relates to a compound represented by a formula (I): wherein X is a group represented by or the like; Y is a group represented by or the like; and Ar
1
is a group represented by or a pharmaceutically acceptable salt thereof.