Palladium-Catalyzed Decarboxylative Coupling Reactions of Propiolic Acid Derivatives and Arylsulfonyl Hydrazide
作者:Kwang Song、Sunwoo Lee、Jaerim Park
DOI:10.1055/s-0036-1591596
日期:2018.8
moderate to good yields. The reaction showed good tolerance toward functional groups such as ester, ketone, cyano, nitro, chloro, and bromo groups. Arylsulfonyl hydrazides were employed as coupling partners for the decarboxylative coupling reaction of propiolic acid derivatives. When the reaction was conducted using Pd(TFA)2 (1.0 mol%), dppp (1.0 mol%), and Cu(OAc)2 (2.4 equiv) in DMF at 100 °C for 0.5
Dihalodiphenylacetylenes are conveniently synthesized by a doubleelimination reaction of β-substituted sulfones which are readily obtained from halogen-substituted benzyl sulfone and benzaldehyde derivatives. Halogens can be incorporated at any desired positions in the diphenylacetylene skeleton simply by choosing the substitution position of the halogen on the aromatic rings of the starting compounds
Palladium-Catalyzed Desulfitative Cross-Coupling of Arylsulfonyl Hydrazides with Terminal Alkynes: A General Approach toward Functionalized Internal Alkynes
A palladium-catalyzed Sonogashira-type coupling between arylsulfonyl hydrazides and terminalalkynes via Ar(C)–S bond cleavage is disclosed, which enables the general synthesis of functionalized internalalkynes, especially the Br-substituted ones, in good to excellent yields under acid- and base-free conditions.
Palladium-catalyzed aerobic oxidative cross-coupling of arylhydrazines with terminal alkynes
作者:Yingwei Zhao、Qiuling Song
DOI:10.1039/c5cc04111b
日期:——
The Pd-catalyzed aerobic oxidative coupling of arylhydrazines with terminal acetylenes was achieved under copper- and base-free conditions.
在无铜和无碱条件下,芳基肼与末端乙炔经Pd催化的需氧氧化偶联。
Method For Preparing Para-Phenyl Alkynyl Benzaldehydes
申请人:Swinnen Dominique
公开号:US20080108849A1
公开(公告)日:2008-05-08
The present invention is related to a new synthesis for preparing para-phenyl alkynyl benzaldehyde of general formula (I). The compounds of formula (1) are useful building blocks, in particular in the synthesis of electrically conducting polymers. R is selected from the group consisting of C
1
-C
12
-alkyl, C
1
-C
12
-alkyl aryl, C
1
-C
12
-alkyl heteroaryl, C
2
-C
12
-alkenyl, C
2
C
12
-alkenyl aryl, C
2
-C
12
-alkenyl heteroaryl, C
2
-C
12
-alkynyl, C
2
-C
12
-alkynyl aryl, C
2
-C
12
-alkynyl heteroaryl, C
3
-C
8
-cycloalkylC
1
-C
12
--alkyl-C
3
-C
8
-cycloalkyl, C
1
-C
12
-alkoxy, aryl, heteroaryl, halides.