已开发出一种高效的钌 (II) 催化串联 C-C/C-N 键与芳基酰胺和 7-氮杂苯并降冰片二烯形成合成顺式稠合二氢苯并[ c ]菲啶酮。酰胺基团起导向基团和离去基团的作用,并提供了一种容易获得药学上有用的苯并[ c ]菲啶生物碱如尼替丁和法加罗宁类似物的途径。本方法与关于氮杂双环烯烃和芳族酰胺的各种官能团相容。氘标记研究提出并支持了涉及定向基团辅助 C-H 活化的反应机制。
Lewis acid-assisted palladium-catalysed dealkoxylation of N-alkoxyamides has been realised in the absence of an external reductant.
Lewis酸辅助钯催化的N-烷氧基酰胺脱烷氧化反应在无外部还原剂的情况下实现。
Synthesis of Difluoromethyl Ketones from Weinreb Amides, and Tandem Addition/Cyclization of <i>o</i>
-Alkynylaryl Weinreb Amides
作者:Jongkonporn Phetcharawetch、Nolan M. Betterley、Darunee Soorukram、Manat Pohmakotr、Vichai Reutrakul、Chutima Kuhakarn
DOI:10.1002/ejoc.201701322
日期:2017.12.15
[Difluoro(phenylsulfanyl)methyl]trimethylsilane (PhSCF2SiMe3) underwent a fluoride-induced nucleophilic addition to the carbonyl group of Weinreb amides to provide the corresponding difluoro(phenylsulfanyl)methyl ketones. These were converted into difluoromethyl ketones through selective reductive cleavage of the phenylsulfanyl group. The reaction of o-alkynyl Weinreb amides derived from benzoic acid derivatives resulted
three-component 1,4-carboamination of dienes is described. Synthetically versatile Weinreb amides were coupled with 1,3-dienes and readily available dioxazolones as the nitrogen source using [Cp*RhCl2 ]2 -catalyzed C-H activation to deliver the 1,4-carboaminated products. This transformation proceeds under mild reaction conditions and affords the products with high levels of regio- and E-selectivity. Mechanistic
PYRIDAZINONE DERIVATIVE AND PDE INHIBITOR CONTAINING THE SAME AS ACTIVE INGREDIENT
申请人:Kyorin Pharmaceutical Co., Ltd.
公开号:EP2168959A1
公开(公告)日:2010-03-31
It is to provide a novel pyridazinone derivative represented by the following general formula (1), which is useful as a pharmaceutical and has a phosphodiesterase inhibitory action:
wherein R1 represents H or C1-6 alkyl, each of R2 and R3 represents H, X, C1-6 alkoxy, Z represents O or S, and A represents AA or BB, wherein AA represents:
and BB represents:
wherein R4 represents H or C1-6 alkyl, and each of R5 and R6 represents C1-6 alkyl.
Disclosed herein are modulators of TRPV3 of formula (II):
wherein G
1
, X
1
, X
2
, X
3
, X
4
, X
5
, G
2
, R
a
, R
b
, and u are as defined in the specification. Compositions comprising such compounds and methods for treating conditions and disorders using such compounds and compositions are also presented.