Alternating copolymerizations of dioxaphospholanes with acrylic acid derivatives and with α-keto acids. New synthesis of polyphosphonates

Takeo Saegusa, Tsunenori Yokoyama, Shiro Kobayashi

doi:10.1007/bf00280966

Alternating copolymerizations of dioxaphospholanes with acrylic acid derivatives and with α-keto acids. New synthesis of polyphosphonates

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説明

We have d e v e l o p e d a s e r i e s o f new c o p o l y m e r i z a t i o n s which occur without added catalyst and proceed through zwitterion intermediates (SAEGUSA et al, 1975a, b; 1976a; 1977a). In these copolymerization, a monomer of nucleophilic reactivity (M N) reacts with another monomer having electrophilic reactivity (M E ) to _ generate a key + intermediate of zwitterion MN-M E . On the basis of this concept we found new polymer synthesis reactions to form polyphosphinate 7 from 4 and 2a (SAEGUSA et al, 1976b) and polyphosphate 8 from 1 and 5 ~SAEGUSA et al, 1977b). In both cases, 1 and 4 acted as nucleophilic monomer (M N) and 2 and 5