Conformational control of aliphatic oligoketones bearing two 1,3-diketone subunits is achieved by molecular recognition with pillar[5]arene. Pillar[5]arene binds to aliphaticketones, with association constants K of ∼10 M–1, to form pseudorotaxanes. The pseudorotaxanes are locked by BF2 complexation at the 1,3-diketone sites through quasi-solid-state reactions. X-ray crystallography reveals linear conformations
带有两个1,3-二酮亚基的脂肪族低聚酮的构象控制是通过使用柱[5]芳烃进行分子识别来实现的。支柱[5]芳烃与脂肪族酮结合,缔合常数K为〜10 M –1,形成假轮烷。伪轮烷通过准固态反应被BF 2络合锁定在1,3-二酮位。X射线晶体学揭示了轴分子的线性构象。超分子构象限制的影响是使用烷基连接的二元生色团系统进行评估的,该系统在分子内聚集时会显示溶剂化变色现象。
Cuprous chloride catalyzed alkylations of .beta. diketones with methylene halides
作者:K. Gerald Hampton、J. Joseph Christie
DOI:10.1021/jo00878a029
日期:1976.8
Compositions stabilisées de polymère chloré
申请人:RHONE-POULENC CHIMIE
公开号:EP0490780B1
公开(公告)日:1995-06-07
Compositions de polymère halogéné stabilisées à l'aide d'un additif minéral
申请人:RHONE-POULENC CHIMIE
公开号:EP0508857B1
公开(公告)日:1997-06-25
HAIR TREATMENT COMPOSITION
申请人:Lonza Ltd.
公开号:US20160220466A1
公开(公告)日:2016-08-04
A hair treatment composition is described that contains an acetoacetylated compound. The acetoacetylated compound, for instance, can be a bis acetoacetylated compound. In one embodiment, for instance, the acetoacetylated compound comprises a bis acetoacetate or a bis acetoacetamide. In one embodiment, the hair treatment composition can be used to straighten hair. The composition is also well suited for decreasing hair frizz. The acetoacetylated compound is capable of crosslinking hair fibers upon the application of heat.