Synthesis of 2H,2H-perfluoroalkyl and 2H-perfluoroalkenyl carboxylic acids and amides
摘要:
An efficient and convenient procedure for the synthesis of 2-perfluoroalkyl ethanoic acids by direct oxidation of 2-perfluoroalkyl ethanols with Jones' reagent (CrO3/H2SO4) is described. Treatment of the acids with aqueous sodium hydroxide gave 3-perfluoroalkyl, 3-fluoro-2,3-propenyl carboxylic acids which may be used for the preparation of the corresponding chlorides and amides.
The synthesis of different types of amphiphilic compounds containing peptidoamine groups leads to surfactants
with original properties such as the ability to coordinate metal ions. Water soluble acylcarcinine and alkylamidocarnosine surfactants are compared and the preparation of a silyloxyalkylamidocarnosine is described. The latter can be copolymerised with tetraalkoxysilanes to yield amphipathic organo-mineral solids that are also good ligands for metal cations.
Process for preparing polyisocyanates containing iminooxadiazinedione groups
申请人:Richter Frank
公开号:US20060079694A1
公开(公告)日:2006-04-13
The present invention relates to process for preparing a polyisocyanate containing an iminooxadiazinedione group by trimerizing a portion of the isocyanate groups of a polyisocyanate, which does not contain iminooxadiazinedione groups, in the presence of a catalyst containing an anion corresponding to formula I)
(R
f
)
n
—CR′
(3-n)
—C(O)O
−
(I)
wherein
R
f
is a perfluorinated C
1
-C
30
radical which is optionally branched, cyclic and/or unsaturated,
R′ are identical or different, optionally heteroatom-containing substituents selected from H, C
1
-C
20
alkyl and/or aryl and n is 1 or 2.