Synthesis of cyclic polysulfides: Controlled ring??expansion polymerization of cyclic tetrathioester with thiirane

H Kudo, Y Takeshi

Index: Kudo, Hiroto; Takeshi, Yuki Journal of Polymer Science, Part A: Polymer Chemistry, 2014 , vol. 52, # 6 p. 857 - 866

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Abstract

ABSTRACT We synthesized cyclic tetrathioesters containing thioester moieties at the o- position (o-CTE) and m-position (m-CTE) of an aromatic skeleton. The reaction of phenoxy propylenesulfide (PPS) with o-CTE and m-CTE was examined using tetrabutylammonium chloride as a catalyst in 1-methyl-2-pyrrolidinone, yielding the corresponding cyclic polysulfides poly [o-CTE (PPS) n] with M n's= 37,000–54,000 at 34–61% yields and poly [ ...