Baylis et al., Journal of the Chemical Society, 1958, p. 2962,2966
作者:Baylis et al.
DOI:——
日期:——
BLENDS OF ACRYLIC COPOLYMER THICKENERS
申请人:Lubrizol Advanced Materials, Inc.
公开号:EP2591010A1
公开(公告)日:2013-05-15
[EN] BLENDS OF ACRYLIC COPOLYMER THICKENERS<br/>[FR] MÉLANGES D'ÉPAISSISSANTS DE TYPE COPOLYMÈRES ACRYLIQUES
申请人:LUBRIZOL ADVANCED MAT INC
公开号:WO2012054107A1
公开(公告)日:2012-04-26
Disclosed are blends of acrylic polymers comprising at least one crosslinked acrylic copolymer and at least one linear acrylic copolymer. The acrylic polymer blends surprisingly provide desirable rheological, clarity, and aesthetic properties in aqueous surfactant containing compositions, particularly at low pH.
A High Yield Synthesis of Phosphatidyl Ethanolamines Using Phosphoramidite Intermediates
作者:Christopher Mcguigan、Bernadette Swords
DOI:10.1055/s-1993-25816
日期:——
Alkyl 2-aminoethyl hydrogen phosphates (phosphatidyl ethanolamines) were prepared via phosphoramidite chemistry. tert-Butoxy-carbonyl N-protection of 2-aminoethanol, followed by cyclisation with phosphorus(III) chloride gave the phosphoramidite 3-tert-butoxycarbonyl-2-chloro-1,3, 2-oxazaphospholidine (3). This reacted with long chain alcohols (C6 to C18) to give 2-alkyloxy-3-tert-butoxycarbonyl-1,3,2-oxazaphospholidines 4a-d which were oxidised to 2-alkyloxy-3-tert-butoxycarbonyl-2-oxo-1,3, 2-oxazaphospholidines 5a-d with dinitrogen tetroxide. Simultaneous heterocycle cleavage and N-deprotection were achieved with refluxing aqueous tetrahydrofuran, to give the target 2-aminoethyl phosphates 6a-d. The reaction conditions are mild, and the yields are almost quantitative in terms of the long chain alcohol. The products and intermediates are fully characterised by a range of spectroscopic and analytical methods.