Preparation of poly[(1,1-dipropyl)butane-1,4-diyl], (Pr2CCH2CH2CH2)n, via regiospecific ring opening polymerisation of 3,3-dipropylcyclobutene
作者:Roger W. Alder、Paul R. Allen、Ezat Khosravi
DOI:10.1039/c39940001235
日期:——
A general route to 3,3-disubstituted cyclobutenes is described and 3,3-dipropylcyclobutene is subjected to ring opening metathesis polymerisation (ROMP) using the Schrock initiator, Mo(CHR)(NAr)(OR′)2, where R is C6H5C(Me)2-, Ar is 2,6-diisopropylphenyl and R′ is (Me)3C- to give a polymer which is completely regiospecific (HT) and stereospecific (trans); the polymer is reduced to poly[(1,1-dipropyl)butane-1,4-diyl], which shows evidence of unusual properties associated with the conformational control exerted by the quaternary centres.
描述了生成 3,3-二取代环丁烯的一般路线,并使用 Schrock 引发剂 Mo(CHR)(NAr)(OR')2 对 3,3-二丙基环丁烯进行开环复分解聚合 (ROMP),其中 R 是 C6H5C (Me)2-,Ar是2,6-二异丙基苯基,R'是(Me)3C-,得到完全区域特异性(HT)和立体特异性(反式)的聚合物;该聚合物被还原为聚[(1,1-二丙基)丁烷-1,4-二基],这显示出与四元中心所施加的构象控制相关的不寻常特性的证据。