SYNTHESIS AND REACTIONS OF EXO-METHYLENE-CONTAINING POLY(CYCLIC ORTHOESTER)

被引：13

作者：

CHIKAOKA, S ^{[1
]}

TAKATA, T ^{[1
]}

ENDO, T ^{[1
]}

机构：

[1] TOKYO INST TECHNOL,RESOURCES UTILIZAT RES LAB,NAGATSUTA CHO,MIDORI KU,YOKOHAMA,KANAGAWA 227,JAPAN

来源：

MACROMOLECULES | 1994年 / 27卷 / 09期

关键词：

D O I：

10.1021/ma00087a003

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Syntheses of poly(cyclic orthoester) bearing an exo-methylene group (4) by a polymer reaction of the corresponding bromomethyl derivative and radical additions of thiols to 4 were carried out. The exo-methylene-containing poly(cyclic orthoester) 4 was prepared in 74 % yield by dehydrobromination with potassium tert-butoxide of bromomethyl-substituted poly(cyclic orthoester) which was synthesized by cationic single ring-opening polymerization of 2-(bromomethyl)-1,4,6-trioxaspiro[4.6]undecane (6) with tin(IV) chloride. 4 contained little bromomethyl group, indicating that the elimination of hydrogen bromide proceeded very efficiently. 4 underwent radical additions of ethanethiol and 1,3-propanedithiol under photoirradiation conditions at room temperature to afford the corresponding ethylthio group-containing poly(cyclic orthoester) (8) and cross-linked polymer in quantitative yields, respectively. The ethanethiol adduct (8) was readily converted to the corresponding monomeric ethanethiol adduct by treatment with an acid catalyst.

引用

页码：2380 / 2382

页数：3

共 14 条

[1]

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[2]

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[3] COPOLYMERIZATION UTILIZING AN EQUILIBRIUM POLYMERIZATION SYSTEM - CATIONIC COPOLYMERIZATIONS OF 1,4,6-TRIOXASPIRO[4.6]UNDECANE WITH 2-METHYL-1,4,6-TRIOXASPIRO[4.5]DECANE AND 2-METHYL-1,4,6-TRIOXASPIRO[4.4]NONANE [J].