Synthesis of polymer analogues of triphenylselenonium chloride as phase‐transfer catalysts

Kondo, Shuji; Shibata, Akihiro; Ando, Tsugumichi; Kunisada, Hideo; Yuki, Yasuo

doi:10.1002/marc.1994.030150317

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Cited by 3 publications

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Asymmetric Catalysis of Chiral Bifunctional Selenides and Selenonium Salts Bearing a Urea Group

2021

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Catalytic asymmetric reactions with chiral organoselenium catalysts have become one of the most important research topics in the field of organocatalysis. Despite the presence of several effective chiral selenium catalysts, further developments of new chiral organoseleniums are still desired due to their remarkable potential as asymmetric organocatalysts. Herein, we report the synthesis and asymmetric catalysis of chiral bifunctional selenides and selenonium salts bearing a urea group. The new chiral bifunctional selenide organocatalysts promote asymmetric halocyclizations with good to high levels of enantioselectivity. Furthermore, we report a reaction involving a precious example of a chiral tertiary selenonium salt‐catalyzed asymmetric phase‐transfer conjugate addition.

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Asymmetric Catalysis of Chiral Bifunctional Selenides and Selenonium Salts Bearing a Urea Group

2021

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Synthesis and free radical polymerization of p‐methylseleno‐ and p‐phenylselenostyrenes

Ando

Kwon

Kitagawa

et al. 1996

Macro Chemistry & Physics

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p-Methylselenostyrene (1) and p-phenylselenostyrene (2) as selenium-containing vinyl monomers were prepared. Both monomers are readily polymerized free radically to afford the corresponding polymers having molecular weight of about 20000 -150000.These homopolymers are stable below 300 "C. From the copolymerization with styrene, Q values of 1 and 2 were calculated to be 1,18 and 1,03, respectively. On the other hand, e values of these monomers are 4 , 2 4 and -0,04, respectively, indicating the electron withdrawing character of the seleno groups.

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Triphase catalysis

Tomoi¹

1997

Handbook of Phase Transfer Catalysis

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Synthesis of polymer analogues of triphenylselenonium chloride as phase‐transfer catalysts

Cited by 3 publications

References 6 publications

Asymmetric Catalysis of Chiral Bifunctional Selenides and Selenonium Salts Bearing a Urea Group

Asymmetric Catalysis of Chiral Bifunctional Selenides and Selenonium Salts Bearing a Urea Group

Synthesis and free radical polymerization of p‐methylseleno‐ and p‐phenylselenostyrenes

Triphase catalysis

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