Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
  • C07H21/00—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B82—NANOTECHNOLOGY
  • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
  • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J19/0046—Sequential or parallel reactions, e.g. for the synthesis of polypeptides or polynucleotides; Apparatus and devices for combinatorial chemistry or for making molecular arrays
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00277—Apparatus
  • B01J2219/00497—Features relating to the solid phase supports
  • B01J2219/00527—Sheets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00277—Apparatus
  • B01J2219/00497—Features relating to the solid phase supports
  • B01J2219/00527—Sheets
  • B01J2219/00529—DNA chips
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00583—Features relative to the processes being carried out
  • B01J2219/00585—Parallel processes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00583—Features relative to the processes being carried out
  • B01J2219/0059—Sequential processes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00583—Features relative to the processes being carried out
  • B01J2219/00596—Solid-phase processes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00583—Features relative to the processes being carried out
  • B01J2219/00599—Solution-phase processes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00583—Features relative to the processes being carried out
  • B01J2219/00603—Making arrays on substantially continuous surfaces
  • B01J2219/00605—Making arrays on substantially continuous surfaces the compounds being directly bound or immobilised to solid supports
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00583—Features relative to the processes being carried out
  • B01J2219/00603—Making arrays on substantially continuous surfaces
  • B01J2219/00605—Making arrays on substantially continuous surfaces the compounds being directly bound or immobilised to solid supports
  • B01J2219/00614—Delimitation of the attachment areas
  • B01J2219/00621—Delimitation of the attachment areas by physical means, e.g. trenches, raised areas
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00583—Features relative to the processes being carried out
  • B01J2219/00603—Making arrays on substantially continuous surfaces
  • B01J2219/00659—Two-dimensional arrays
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00709—Type of synthesis
  • B01J2219/00711—Light-directed synthesis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
  • B01J2219/00718—Type of compounds synthesised
  • B01J2219/0072—Organic compounds
  • B01J2219/00722—Nucleotides
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
  • C07B2200/00—Indexing scheme relating to specific properties of organic compounds
  • C07B2200/11—Compounds covalently bound to a solid support
• • C—CHEMISTRY; METALLURGY
  • C40—COMBINATORIAL TECHNOLOGY
  • C40B—COMBINATORIAL CHEMISTRY; LIBRARIES, e.g. CHEMICAL LIBRARIES
  • C40B40/00—Libraries per se, e.g. arrays, mixtures
  • C40B40/04—Libraries containing only organic compounds
  • C40B40/06—Libraries containing nucleotides or polynucleotides, or derivatives thereof
• • C—CHEMISTRY; METALLURGY
  • C40—COMBINATORIAL TECHNOLOGY
  • C40B—COMBINATORIAL CHEMISTRY; LIBRARIES, e.g. CHEMICAL LIBRARIES
  • C40B50/00—Methods of creating libraries, e.g. combinatorial synthesis
  • C40B50/08—Liquid phase synthesis, i.e. wherein all library building blocks are in liquid phase or in solution during library creation; Particular methods of cleavage from the liquid support
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P20/00—Technologies relating to chemical industry
  • Y02P20/50—Improvements relating to the production of bulk chemicals
  • Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups

Definitions

• the present invention relates to a method for the targeted photolytic deprotection of immobilized nucleoside derivatives, in particular in the photolithographic production of DNA chips.
• nucleoside derivatives are immobilized with photolabile protective groups on suitable carrier materials. This is followed by the targeted deprotection by photolysis. Due to the lack of post-synthetic cleaning methods, very high demands are placed on the chemistry of the protective groups.
• the DNA chips are exposed in a flow chamber with a suitable solvent or solvent mixture (cf. GH McGall, AD Barone, M. Diggelmann, SPA Fodor, E. Gentalen, N. Ngo, J. Am. Chem. Soc 1997, 119, 5081-5090).
• a suitable solvent or solvent mixture cf. GH McGall, AD Barone, M. Diggelmann, SPA Fodor, E. Gentalen, N. Ngo, J. Am. Chem. Soc 1997, 119, 5081-5090.
• the carrier material for example in the form of a glass carrier
• a suitable solvent mixture is pumped through the flow chamber, as a result of which the synthesis side of the substrate is wetted and the immobilized growing DNA chains are virtually in solution.
• the exposure of the chip surface takes place from the "wrong" side, ie from behind through the carrier material (for example in the form of glass plates).
• This process method has some disadvantages.
• the light scattering on the glass substrate causes poor optical resolution.
• the heating of the carrier material and insufficient wetting of the carrier material surface can lead to thermal and photolytic side reactions.
• the photolabile protective group to be split off is located at the other end of the light path, the oligonucleotide chain that is present can act as a light filter, which on the one hand harbors the risk of photolytic side reactions and on the other hand can cause an increase in the exposure time.
• the present invention was therefore based on the object of developing a method for the targeted photolytic removal of protective groups from nucleoside derivatives immobilized on a support material, in particular of protective groups customary in DNA chip production, which does not have the disadvantages of the prior art mentioned , but enables a quick and complete deprotection.
• This object is achieved according to the invention in that a layer of a gel or a viscous liquid composed of polymer compounds in water, a water / CC 4 alcohol mixture and / or a polar aprotic on the support material with the nucleoside derivatives to be deprotected Solvent is applied. It has surprisingly been found that thermal and photolytic side reactions are largely suppressed in this way, so that the synthesized nucleoside or nucleotide sequences have the required purity.
• “Targeted photolytic cleavage” in connection with the method according to the invention means the selective cleavage of photolabile protective groups from the protected nucleoside derivatives. In the context of the present invention it is therefore also possible, in addition to complete elimination, to remove only a part of the photolabile protective groups, e.g. with the help of masks.
• a layer of a gel or a viscous liquid composed of one or more polymer compounds in water, a water / C. Is applied to the substrate surface, ie the support material with the immobilized nucleoside derivatives consisting of nucleosides, nucleotides or oligonucleotides r C 4 alcohol mixture and / or a polar aprotic solvent applied before the exposure of the nucleoside derivatives is preferably carried out from the front.
• the layer thickness of the gel or the viscous liquid can be varied within wide limits, but it has proven to be particularly advantageous for optimal optical resolution to set the layer thickness to 0.1 ⁇ m to 5 mm, particularly preferably 10 ⁇ m to 5 mm .
• the proportion of polymer compounds should preferably be 0.1 to 40% by weight, in particular 1 to 20% by weight, based on the total weight of the gel or the viscous liquid.
• those polymers are used for the construction of the gels which have a sol / gel transition temperature of 15 to 90 ° C., in particular 30 to 50 ° C.
• the advantage of these gels is that they can be converted to the liquid state at room temperature and by gentle heating so that the corresponding gels can be removed very easily from the respective carrier material after the photolytic deprotection.
• the gels used should preferably have a gel strength of 20 to 10,000 g / cm 2 , in particular 100 to 1,000 g / cm 2 .
• the gel strength is usually determined by compression tests, which are familiar to the person skilled in the art. If gelatin is used, the gel strength can also be determined using the Bloom method.
• the gel strength corresponds to the force in grams that a defined cylindrical piston has to apply to the surface of a 6.67% gelatin gel (obtained after 17 hours at 10 ° C.) in order to obtain an impression depth of 4 mm.
• the gel strength determined in this way in the process according to the invention is then preferably 5 to 300 g.
• viscous liquids are used, they should preferably have a dynamic viscosity of 5 to 40,000 mPa-s, in particular 50 to 15,000 mPa-s,
• PVA polyvinyl alcohol
• Polyvinyl acetal polyacrylamide, polyvinyl pyrrolidone (PVP), polyvinyl acetate,
• Formaldehyde proved to be particularly advantageous.
• gelatin agarose, agar, pectin,
• Galactomannans, carrageenans, scleroglucans, xanthans and alginates are used.
• the solvent for the gel or the viscous in the method according to the invention, the solvent for the gel or the viscous
• Liquid water, a water / CC-alcohol mixture and / or a polar aprotic solvent The alcohols, which can be linear or branched can be used in a mixture with water in a preferred weight ratio of 90/10 to 10/90.
• the alcohols can contain one or more OH groups and in particular can be selected from methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-methyl-1-propanol, 2-butanol, 2-methyl-2-propanol , Ethylene glycol, 1,3-propanediol, 1,2-propanediol, glycerin, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol and 2,3-butanediol.
• the polar aprotic solvents preferably consist of dimethyl sulfoxide (DMSO), dimethylformamide (DMF), dimethylacetamide (DMA), acetonitrile, N-methylpyrrolidone,
• additives are added to the gel or the viscous liquid, which enable rapid and, if possible, side reaction-free photolysis .
• Suitable additives are, for example, accelerators in the form of weak bases such as e.g. B.
• Imidazole pyrazole, 1-methylimidazole, 1,8-diazabicyclo [5,4,0] undec-7-ene (DBU), 1,5-diazabicyclo [4,3,0] non-5-ene (DBN ), 1,4-diazabicyclo [2,2,2] octane, morpholine, N-methylmorpholine, piperidine, N-methylpiperidine, piperazine, N-methylpiperazine, diisopropylethylamine, triethylamine, pyridine, quinoline, collidine, lutidine or picoline. Furthermore, connections such. B.
• urea, thiourea, guanidine hydrochloride, glycine, tris (hydroxymethyl) aminomethane, tris (hydroxymethyl) aminomethane hydrochloride or mannitol have been found to be particularly advantageous, which have a positive effect on photolysis.
• Redox buffers in the form of histidine, polyhistidine, imidazole, thiourea, tris (hydroxymethyl) nitromethane, sodium azide and / or ascorbic acid are used as further preferred additives to trap the free radicals which interfere with the photolysis.
• UV sensitizers for example in the form of benzoic acid or benzoic acid salts (preferably alkali metal salts such as, for example, sodium or potassium salts), can also be added to the gel or the viscous liquid.
• consistency regulators are added to the gel or the viscous liquid in an amount of 0.001 to 10% by weight, based on the total weight of the gel or the viscous liquid, based on alkali or alkaline earth metal salts (e.g. NaCl, KC1, CaCl 2 ) added.
• alkali or alkaline earth metal salts e.g. NaCl, KC1, CaCl 2
• the corresponding additives it is also possible for the corresponding additives to be covalently bound to the polymer compounds and for these to be present in the form of functional groups. Examples of such functionalized polymer compounds are, for example, esterified or partially esterified polyvinyl alcohols.
• the nucleoside solution is applied to a suitable carrier material and immobilized. Immobilization can take place, for example, by evaporation of the solvent.
• the nucleoside derivatives can be immobilized on the support surface by covalent bonding.
• a linker is applied covalently to the substrate surface, which has terminal OH or NH2 functions.
• NTEOC-T Nitrothien-2-yl] ethoxycarbonyl] thymidine
• NPOC-T 5'-O- [2- (3-Nitrothien-2-yl) propoxycarbonyljthymidine
• MMOC-T 5'-0 - [(7-methoxycoumarin -4-yl) methyloxycarbonyl] thymidine
• This substrate surface is then covered with a thin and homogeneous layer of the polymer gel or the viscous liquid, the coating of the substrate surface preferably being carried out by spin coating.
• the photolysis of the nucleoside derivatives which are quasi-dissolved in the gel or in the viscous liquid, can take place, with the exposure usually taking place from the front.
• the photolysis under an inert gas atmosphere, such as. As nitrogen or argon, carried out to largely suppress possible side reactions.
• the gel or the viscous liquid is removed again from the carrier material, which can be done purely thermally in the case of gels with a relatively low sol / gel transition temperature or else with a suitable solvent (DMSO, DMF, water).
• a suitable solvent DMSO, DMF, water
• polymer gels or viscous solutions can accelerate photolysis with the appropriate additives, intercept by-products, align the (01igo) nucleotide chains appropriately, and intercept the heat of reaction. In this way, a fast, clean and complete removal of the photolabile protective groups from the nucleoside derivatives is promoted, which in turn results in the required purity of the synthesized nucleotide or oligonucleotide sequences.
• a model for the simulation of photolithographic solid phase synthesis could be established.
• a nucleoside solution is applied to the bottom of a reaction chamber of a microtiter plate. After the solvent has evaporated, the photolabile-protected nucleoside is evenly distributed on the bottom of the reaction chamber. It can now be "dry” or irradiated with a gel and / or a viscous liquid covered with polymer compounds "from the front". The photolysis is evaluated quantitatively by means of HPLC. It could be shown with this model that the cleavage is much worse with dry photolysis than with the irradiation of a gel or a viscous liquid from polymer compounds.

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• 2000
  • 2000-03-09 DE DE10011400A patent/DE10011400A1/de not_active Withdrawn
  • 2000-03-13 AT AT00912603T patent/ATE265270T1/de not_active IP Right Cessation
  • 2000-03-13 AU AU34294/00A patent/AU3429400A/en not_active Abandoned
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