描述了铜介导的醛的C(sp 2)–H三氟甲基化。在室温下,醛与(bpy)Cu(CF 3)3,Et 3 SiH和K 2 S 2 O 8在丙酮水溶液中的反应以令人满意的产率提供了相应的三氟甲基酮。该协议适用于脂族和芳族醛,并具有广泛的底物范围和广泛的官能团相容性。提出了一种涉及Cu(II)介导的酰基三氟甲基化的机理。
描述了铜介导的醛的C(sp 2)–H三氟甲基化。在室温下,醛与(bpy)Cu(CF 3)3,Et 3 SiH和K 2 S 2 O 8在丙酮水溶液中的反应以令人满意的产率提供了相应的三氟甲基酮。该协议适用于脂族和芳族醛,并具有广泛的底物范围和广泛的官能团相容性。提出了一种涉及Cu(II)介导的酰基三氟甲基化的机理。
Catalytic Asymmetric Synthesis of Cyclohexanes by Hydrogen Borrowing Annulations
作者:Roly J. Armstrong、Wasim M. Akhtar、Tom A. Young、Fernanda Duarte、Timothy J. Donohoe
DOI:10.1002/anie.201907514
日期:2019.9.2
Hydrogen borrowing catalysis serves as a powerful alternative to enolate alkylation, enabling the direct coupling of ketones with unactivated alcohols. However, to date, methods that enable control over the absolute stereochemical outcome of such a process have remained elusive. Here we report a catalytic asymmetric method for the synthesis of enantioenriched cyclohexanes from 1,5‐diols via hydrogen
Novel 4-(2-furoyl) aminopiperidines, intermediates in synthesizing the same, process for producing the same and medicinal use of the same
申请人:Fukutomi Ryuuta
公开号:US20050085508A1
公开(公告)日:2005-04-21
There are provided novel 4-(2-furoyl)aminopiperidines represented by the general formula (I), their synthetic intermediates, processes for their preparation and medicaments containing them.
In the above formula, X is CH or N, and Y is a group of the following general formula (II), formula (II-a) or formula (III):
wherein a, b and c are each an integer of 0-6;
Z is CH
2
or NH; W is O or S;
T is O or N—R
15
wherein R
15
is H, a C1-C6 alkyl group, a benzyl group or a phenethyl group; and
R
1
is H, a C1-C6 alkoxycarbonyl group, a benzyloxycarbonyl group, or the like. The 4-(2-furoyl)aminopiperidine derivatives according to this invention possess opioid μ antagonistic activity and are useful for the treatment or prevention of side effects which are caused by μ receptors agonist and which are selected from constipation, nausea/emesis or itch, or for the treatment or prevention of idiopathic constipation, postoperative ileus, paralytic ileus, irritable bowel syndrome or chronic pruritus.
Novel 4-(2-furoyl) aminopiperidienes, intermediates for synthesizing the same, processes for preparing the same and medicinal use of the same
申请人:Fukutomi Ryuuta
公开号:US20080194826A1
公开(公告)日:2008-08-14
A compound represented the general formula (V):
wherein
X is CH or N; and
Y
a
is a group of the general formula selected from:
一个化合物的一般式表示为(V):其中X是CH或N; 而Y是从一般式中选择的一个基团:
4-(2-furoyl) aminopiperidines, intermediates in synthesizing the same, process for producing the same and medicinal use of the same
申请人:Kyorin Pharmaceutical Co., Ltd.
公开号:US07375115B2
公开(公告)日:2008-05-20
There are provided novel 4(2-furoyl)aminopiperidines represented by the general formula (I), their synthetic intermediates, processes for their preparation and medicaments containing them.
In the above formula, X is OH or N, and Y is a group of the following general formula (II), formula (II-a) or formula (III):
wherein
a, b and c are each an integer of 0-6;
Z is CH2 or NH;
W is O or S;
T is O or N—R15 wherein R15 is H, a C1-C6 alkyl group,
a benzyl group or a phenethyl group; and
R1 is H, a C1-C6 alkoxycarbonyl group, a benzyloxy-carbonyl group, or the like.
The 4-(2-furoyl)aminopiperidine derivatives according to this invention possess opioid μ antagonistic activity and are useful for the treatment or prevention of side effects which are caused by μ receptors agonist and which are selected from constipation, nausea/emesis or itch, or for the treatment or prevention of idiopathic constipation, postoperative ileus, paralytic ileus, irritable bowel syndrome or chronic pruritus.