Novel synthesis of aromatic polyamides by palladium-catalyzed polycondensation of aromatic dibromides, aromatic diamines, and carbon monoxide

1988 ◽  
Vol 21 (7) ◽  
pp. 1908-1911 ◽  
Author(s):  
Masaru Yoneyama ◽  
Masaaki Kakimoto ◽  
Yoshio Imai
Keyword(s):  
Carbon Monoxide ◽  
Aromatic Diamines ◽  
Aromatic Polyamides ◽  
Novel Synthesis ◽  
Palladium Catalyzed

Synthesis of poly(ether ketone amide)s by a heterogeneous palladium-catalyzed polycondensation of aromatic diiodides, diamines, and carbon monoxide

2018 ◽  
Vol 31 (4) ◽  
pp. 425-437 ◽  
Author(s):  
Bin Huang ◽  
Pingping Wang ◽  
Xiaojun Zhu ◽  
Mingzhong Cai
Keyword(s):  
Carbon Monoxide ◽  
Palladium Complex ◽  
Significant Loss ◽  
Aromatic Diamines ◽  
Glass Transition Temperatures ◽  
External Magnet ◽  
Palladium Catalyzed ◽  
Bidentate Phosphine ◽  
Ether Ketone ◽  
Heterogeneous Palladium Catalyst

A series of novel aromatic poly(ether ketone amide)s (PEKAs) were synthesized by the heterogeneous palladium-catalyzed carbonylative polycondensation of aromatic diiodides with ether ketone units, aromatic diamines, and carbon monoxide in N, N-dimethylacetamide (DMAc) at 120°C using 6 mol% of a magnetic nanoparticles–supported bidentate phosphine palladium complex (Fe3O4@SiO2-2P-PdCl2) as catalyst and 1,8-diazabicyclo[5,4,0]-7-undecene as base. The PEKAs had inherent viscosities ranging from 0.61 dl g−1 to 0.75 dl g−1. All the PEKAs were soluble in strong dipolar organic solvents. These PEKAs showed glass transition temperatures between 178°C and 232°C and 10% weight loss temperatures ranging from 443°C to 496°C in nitrogen. These PEKAs could be cast into transparent, flexible, and strong films from DMAc solutions with tensile strengths of 72.8–82.6 MPa, tensile moduli of 2.19–2.84 GPa, and elongations at break of 5.4–7.5%. Importantly, the heterogeneous palladium catalyst can be conveniently recovered from the reaction mixture by simply applying an external magnet and recycled up to eight times without significant loss of activity.

Synthesis of diversely substituted 2-(furan-3-yl)acetates from allenols through cascade carbonylations

2015 ◽  
Vol 51 (90) ◽  
pp. 16263-16266 ◽  
Author(s):  
Yan He ◽  
Xinying Zhang ◽  
Xuesen Fan
Keyword(s):  
Carbon Monoxide ◽  
One Pot ◽  
Novel Synthesis ◽  
Aryl Iodides ◽  
Palladium Catalyzed

Novel synthesis of diversely substituted 2-(furan-3-yl)acetatesviapalladium-catalyzed one-pot multi-component reactions of allenols, aryl iodides, alcohols, and carbon monoxide has been developed. Moreover, the 2-(furan-3-yl)acetates obtained were found to be ready intermediates for the construction of the biologically significant naphtho[1,2-b]furan-5-ol scaffold.

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