The electrochemical fluorination of N-containing carboxylic acids (Part 4). Fluorination of methyl 3-dialkylamino-isobutyrates and methyl 3-dialkylamino-n-butyrates
作者:Takashi Abe、Haruhiko Fukaya、Eiji Hayashi、Yoshio Hayakawa、Masakazu Nishida、Hajime Baba
DOI:10.1016/0022-1139(93)03019-i
日期:1994.2
Several methylesters of 3-dialkylamino-substituted n- and isobutyric acids have been subjected to electrochemical fluorination to give the corresponding perfluoroacid fluorides. Dimethyl, diethyl, pyrrolidino, morpholino, piperidino and N-methylpiperazino groups were investigated as dialkylamino substituents. The structure/yield relationship was evaluated both in terms of the structure of the acid and
Six methyl esters of 3-dialkylamino-substituted propionic acids were subjected to electrochemicalfluorination to give the corresponding perfluoroacid fluorides. The following dialkylamino substituents were investigated: diethylamino, di-n-propyl-amino, di-n-butylamino, pyrrolidino, morpholino and piperidino groups. These perfluoroacid fluorides, which were obtained in fair yields, are considered to
将3-二烷基氨基取代的丙酸的六种甲酯进行电化学氟化,得到相应的全氟代氟化物。研究了以下二烷基氨基取代基:二乙基氨基,二正丙基氨基,二正丁基氨基,吡咯烷基,吗啉代和哌啶子基。这些以合理收率获得的全氟酸氟化物被认为是制备软质(可降解)含氟化合物的潜在关键前体。这些盐在水溶液中显示出明显降低的表面张力。报告了所获得的所有全氟酸氟化物的物理性质,以及它们的光谱数据(19 F NMR,质谱和IR光谱)。
The electrochemical fluorination of nitrogen-containing carboxylic acids. Fluorination of methyl esters of cyclic amino-group substituted carboxylic acids
作者:Takashi Abe、Eiji Hayashi、Haruhiko Fukaya、Hajime Baba
DOI:10.1016/s0022-1139(00)80494-7
日期:1990.11
Nine methyl esters of cyclic amino-group substituted carboxylic acids related to glycine, alanine or β-alanine were subjected to electrochemicalfluorination. This afforded the corresponding perfluoroacid fluorides together with cleavage products in fair yields. As cyclic amino-substituents, pyrrolidino-, morpholino-, piperidino-, hexamethyleneimino- and N′-methyl-piperazinyl-groups were investigated
对与甘氨酸,丙氨酸或β-丙氨酸有关的环状氨基取代的羧酸的九种甲酯进行电化学氟化。这样以合理的产率得到了相应的全氟氟化物和裂解产物。作为环状氨基取代基,研究了吡咯烷基,吗啉代,哌啶子基,六亚甲基亚氨基和N'-甲基哌嗪基。未观察到环化副产物的形成,这与脂族二烷基氨基取代的羧酸的氟化形成对比。从这样的2-环氨基丙酸甲酯[环氨基:吡咯烷基,吗啉代或哌啶子基],与全氟酸氟化物一起得到全氟甲基酯,产率为1-2%和14-29。 % 分别。前一种化合物的形成归因于庞大的环状氨基的阻断作用。报告了所获得的新化合物的物理性质及其光谱(19 F NMR,质量和IR)数据。
Rigid polyurethane foams
申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0662494A1
公开(公告)日:1995-07-12
Process for the preparation of rigid foams comprising the step of reacting an organic polyisocyanate with an isocyanate-reactive material in the presence of a blowing promotor being an isocyanate-reactive cyclic compound of formula:
wherein
Y is O or NR¹ wherein each R¹ independently is a lower alkyl radical of C₁-C₆ or a lower alkyl radical substituted with an isocyanate-reactive group;
each R independently is hydrogen, a lower alkyl radical of C₁-C₆ or (CH₂)m-X wherein X is an isocyanate-reactive group which is OH or NH₂ and m is 0, 1 or 2; and
n is 1 or 2;
with the proviso that at least one of R¹ or R is or comprises an isocyanate-reactive group;
and in the presence of an inert insoluble organic liquid which is present as the dispersed phase of an emulsion or a microemulsion and in the presence of a metal salt catalyst, wherein the isocyanate-reactive material comprises a polyol or polyol mixture of average nominal functionality between 2 and 3 and number average equivalent molecular weight between 31 and 750.
制备硬质泡沫塑料的工艺,包括以下步骤:在发泡促进剂(一种异氰酸酯反应型环状化合物)存在下,使有机多异氰酸酯与异氰酸酯反应型材料发生反应:
其中
Y 是 O 或 NR¹,其中每个 R¹ 独立地是 C₁-C₆ 的低级烷基或被异氰酸酯反应基团取代的低级烷基;
每个 R 独立地是氢、C₁-C₆ 的低级烷基或 (CH₂)m-X,其中 X 是 OH 或 NH₂ 的异氰酸酯反应基团,m 是 0、1 或 2;以及
n 为 1 或 2;
但 R¹ 或 R 中至少有一个是或包含一个异氰酸酯反应基团;
在惰性不溶性有机液体(作为乳液或微乳液的分散相)和金属盐催化剂的存在下, 其中异氰酸酯反应物包括平均公称官能度在 2 和 3 之间、平均当量分子量在 31 和 750 之间的多元醇或多元醇混合物。
Perfluoropolyether lubricating compositions
申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0694602A2
公开(公告)日:1996-01-31
A lubricating composition containing about 0.1-10 weight percent of a perfluoropolyether lubricant containing perfluoropolyether molecules having at least one hydrogen-containing end group per molecule, and about 99.9-90 weight percent of a liquid, perfluorinated, nonaromatic cyclic organic solvent or mixture of such solvents is provided.