Topic
Morpholine
About: Morpholine is a research topic. Over the lifetime, 5411 publications have been published within this topic receiving 51063 citations. The topic is also known as: diethylene imidoxide & diethylene oximide.
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TL;DR: An efficient method for synthesis of oligonucleotide 2'-conjugates via amide bond formation on solid phase is described, well suited in principle for the preparation of peptide-oligonucleotide conjugates containing an amide linkage between the 2'-position of an oligon nucleotide and the N-terminus of a peptide.
Abstract: An efficient method for synthesis of oligonucleotide 2′-conjugates via amide bond formation on solid phase is described. Protected oligonucleotides containing a 2′-O-carboxymethyl group were obtained by use of a novel uridine 3′-phosphoramidite, where the carboxylic acid moiety was introduced as its allyl ester. This protecting group is stable to the conditions used in solid-phase oligonucleotide assembly, but easily removed by Pd(0) and morpholine treatment. 2′-O-Carboxymethylated oligonucleotides were then efficiently conjugated on a solid support under normal peptide coupling conditions to various amines or to the N-termini of small peptides to give products of high purity in good yield. The method is well suited in principle for the preparation of peptide–oligonucleotide conjugates containing an amide linkage between the 2′-position of an oligonucleotide and the N-terminus of a peptide.
20 citations
Patent•
29 Jul 1993
TL;DR: In this paper, microemulsion cleaners comprising an organic solvent, a surfactant blend comprising an anionic and non-ionic surfactants, a glycol ether, and water are used for removing baked-on oil and carbon deposits.
Abstract: This invention relates to microemulsion cleaners comprising (a) an organic solvent (b) a surfactant blend comprising an anionic and nonionic surfactant (c) a glycol ether (d) morpholine, and (e) water. These cleaners can be used for removing baked-on oil and carbon deposits.
20 citations
TL;DR: In this article, a methyl morpholinium-functionalized poly(ether sulfone) copolymer was prepared as a novel anion exchange membrane, which showed good hydrolytic, thermal, mechanical and chemical stabilities.
Abstract: A methyl morpholinium-functionalized poly(ether sulfone) (MM-PES) copolymer was prepared as a novel anion exchange membrane. The MM-PES polymer was synthesized by polycondensation between the morpholine-containing hydroquinone and bisphenol A with bis(4-fluorophenyl)sulfone, followed by methylation of the morpholine group. The membrane obtained from MM-PES showed an IEC of 0.90 meq/g with high hydroxide conductivity of 1.6 × 10−2 S/cm at r.t. and 7.9 × 10−2 S/cm at 80 °C. The methyl morpholinium-functionalized PES membrane also displayed good hydrolytic, thermal, mechanical and chemical stabilities.
20 citations
TL;DR: The results establish that, during the oxidation, the peroxide compound is generated and converts nitrite into nitrogen dioxide by its peroxidatic activity, resulting in an autocatalytic phase.
20 citations
TL;DR: The photophysical properties of three photoinitiators with a covalently linked thioxanthone sensitizer unit absorbing up to 410nm were investigated by laser-flash photolysis and CIDNP spectroscopy.
Abstract: The photophysical properties of three photoinitiators with a covalently linked thioxanthone sensitizer unit absorbing up to 410 nm were investigated by laser-flash photolysis and CIDNP spectroscopy. These complementary techniques revealed two competing reaction pathways of the molecular dyads 1–3: i) triplet-energy transfer from the sensitizer to the morpholine moiety followed by α-cleavage to yield a radical pair, which initiates radical polymerization, and ii) bimolecular electron transfer from the morpholine to the thioxanthone subunit followed by proton transfer. The relative efficiency of these routes is determined by the triplet energy of the photoinitiator moiety relative to that of the sensitizer.
20 citations