Catalytic Reductive Cleavage of Poly(phenylene sulfide) using a Hydrosilane

Synthesis ◽  
2021 ◽  
Author(s):  
Yasunori Minami ◽  
Nao Matsuyama ◽  
Matsuo Yasuaki ◽  
Masanori Tamura ◽  
Kazuhiko Sato ◽  
...  
Keyword(s):  
Main Chain ◽  
Reductive Cleavage ◽  
Phenylene Sulfide

The solvent-insoluble poly(phenylene sulfide) main chain was reductively cleaved by using triethylsilane as a hydrogen source under palladium/IcHex catalytic conditions. After the reaction, benzene and bis(triethylsilyl)sulfide as a sulfide source were formed efficiently. This method could be operated on a gram scale.

Synthesis and characterization of novel poly(phenylene sulfide) containing a chromophore in the main chain

2014 ◽  
Vol 63 (9) ◽  
pp. 1707-1714 ◽  
Author(s):  
Hong Li ◽  
Guo-yu Lv ◽  
Gang Zhang ◽  
Hao-hao Ren ◽  
Xiao-xia Fan ◽  
...  
Keyword(s):  
Main Chain ◽  
Synthesis And Characterization ◽  
Phenylene Sulfide

Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

1989 ◽  
Vol 47 ◽  
pp. 368-369
Author(s):  
Sengshiu Chung ◽  
Peggy Cebe
Keyword(s):  
Single Crystals ◽  
High Performance ◽  
Dilute Solution ◽  
Two Stage ◽  
Annealing Behavior ◽  
High Performance Polymers ◽  
Seeding Method ◽  
Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

Reductive Cleavage of Secondary Sulfonamides: Converting Terminal Functional Groups into Versatile Synthetic Handles

2019 ◽  
Author(s):  
Patrick Fier ◽  
Suhong Kim ◽  
Kevin M. Maloney
Keyword(s):  
Functional Groups ◽  
Late Stage ◽  
Reductive Cleavage ◽  
Bioactive Molecules ◽  
General Method

Sulfonamides are pervasive in drugs and agrochemicals, yet are typically considered as terminal functional groups rather than synthetic handles. To enable the general late-stage functionalization of secondary sulfonamides, we have developed a mild and general method to reductively cleave the N-S bonds of sulfonamides to generate sulfinates and amines, components which can further react <i>in-situ</i> to access a variety of other medicinally relevant functional groups. The utility of this platform is highlighted by the selective manipulation of several complex bioactive molecules.

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