CAS: 1672-46-4; 4-((3S,5R,8R,9S,10S,12R,13S,14S,17R)-3,12,14-Trihydroxy-10,13-Dimethylhexadecahydro-1H-Cyclopenta[a]Phenanthren-17-yl)Furan-2(5H)-One

上下游产品

CAS号80680-86-0 3-Acetyldigoxigenin | CAS号83-44-3 去氧胆酸 | CAS号80680-78-0 23,24-dinor-5β-... | CAS号80680-79-1 20-Methylen-5β-... | CAS号80680-77-9 (R)-4-((3R,5R,8... | CAS号84532-08-1 20-Methylen-5β-... | CAS号84532-09-2 (20R,S)-20,21-E... | CAS号80680-82-6 20-Methylen-5β-... | CAS号80680-81-5 3β-Acetoxy-12α-... | CAS号71-63-6 洋地黄毒苷

📜毛花苷c置于盐酸,乙醇,水体系中,化学反应生成地黄苷元
参考文献:洋地黄苷,洋地黄a,B和c
标题:洋地黄苷,洋地黄a,B和c
摘要:
Doi:10.1002/hlca.193301601136

专利信息

专利号:US-7329515-B2
优先权日:2003-04-21
标题 :Solid support for the synthesis of 3′-amino oligonucleotides
发明人：LEUCK MICHAEL; WOLTER ANDREAS
权利人:SIGMA ALDRICH CO
摘要:The present invention discloses novel methods and solid supports for the synthesis of 3′-amino oligonucleotides. The novel supports are based on an unsubstituted or ring-substituted hydroxymethylbenzoyl linker element wherein the hydroxymethyl group is esterified to a solid phase bound carboxylic acid and the carbonyl group is linked to an amino alcohol as an amide. Oligonucleotides are conveniently synthesized on the novel supports with no modifications in the standard phosphoramidite synthesis scheme. The ester function of the support is cleaved under the alkaline deprotection conditions for oligonucleotides to provide a free hydroxymethyl group that aids in the release of the 3′-amino oligonucleotide products with a free amino group through neighbor group participation. The free amino group of the oligonucleotides is available for further conjugation reactions to haptens, reporter groups, surfaces or other small molecules or biomolecules. The methods provided are particularly mild, do not require any modifications in standard protocols for the synthesis and deprotection of oligonucleotides, provide the 3′-amino oligonucleotides free of side products and do not introduce chiral centers to the oligonucleotides.

专利号:US-5945312-A
优先权日:1996-04-15
标 题 :Synthesis of fluorophore-labeled DNA
发明人：GOODMAN MYRON F; REHA-KRANTZ LINDA J
权利人:UNIV SOUTHERN CALIFORNIA; UNIV ALBERTA
摘要:Sequencing methods and methods for synthesizing DNA probes using mutant bacteriophage T4 DNA polymerases which have increased ability to incorporate modified nucleotides for the synthesis of long or short chains of complementary, modified, e.g., fluorophore-labeled DNA. In general, the mutant T4 DNA polymerases retain 3'→5' exonuclease activity; hence, reduction or elimination of 3'→5' exonuclease activity is not a prerequisite for efficient synthesis of a complementary fluorophore-labeled or other modified DNA. In fact, retention of 3'→5' exonuclease activity increases accuracy of DNA replication, because these exonucleases proofread or edit the product of DNA replication.

专利号:US-6451543-B1
优先权日:1998-08-31
标题:Lipid matrix-assisted chemical ligation and synthesis of membrane polypeptides
发明人：KOCHENDOERFER GERD G; HUNTER CHRISTIE L; KENT STEPHEN B H; BOTTI PAOLO
权利人:GRYPHON SCIENCES
摘要:The present invention relates to methods and compositions for lipid matrix-assisted chemical ligation and synthesis of membrane polypeptides that are incorporated in a lipid matrix. The invention is exemplified in production of a prefolded membrane polypeptide embedded within a lipid matrix via stepwise chemoselective chemical ligation of unprotected peptide segments, where at least one peptide segment is embedded in a lipid matrix. Any chemoselective reaction chemistry amenable for ligation of unprotected peptide segments can be employed. Suitable lipid matrices include liposomes, micelles, cell membrane patches and optically isotropic cubic lipidic phase matrices. Prefolded synthetic and semi-synthetic membrane polypeptides synthesized according to the methods and compositions of the invention also permit site-specific incorporation of one or more detectable moieties, such as a chromophore, which can be conveniently introduced during synthesis. The methods and compositions of the invention have multiple uses. For example, they can be used to assay ligand binding to membrane polypeptides and domains comprising a receptor, and thus are extremely useful for structure/function studies, drug screening/selection/design, and diagnostics and the like, including high-throughput applications. The methods and compositions of the invention are particularly suited for FRET analyses of previously inaccessible membrane polypeptides.

专利号:US-2005130201-A1
优先权日:2003-10-14
标 题 :Splint-assisted enzymatic synthesis of polyribounucleotides
发明人：DERAS MICHAEL; PLEISS JEFFREY A; SCARINGE STEPHEN
权利人:DHARMACON INC
摘要:The present invention comprises methods and compositions for splint-assisted enzymatic synthesis of polyribonucleotides using an RNA polymerizing enzyme. The invention provides ligating ribonucleotides comprising ligating a donor RNA molecule to an acceptor RNA molecule in the presence of RNA ligase and a splint, wherein the donor RNA molecule is comprised of at least one nucleotide and a ligation linker moiety, the acceptor RNA molecule is comprised of at least one nucleotide and a ligation linker moiety and the splint is comprised of a polyribonucleotide. The invention also provides splints for use in splint-assisted enzymatic synthesis using an RNA polymerizing enzyme.

专利号:WO-2024153642-A1
优先权日:2023-01-16
标题 :Scarless template-free enzymatic synthesis of polynucleotides
发明人：HORGAN ADRIAN; VERARDO DAMIANO; ADELIZZI BEATRICE; RODRIGUEZ-PINZON DANIEL; THOMEE EMMA
权利人:DNA SCRIPT
摘要:Methods are provided for template-free enzymatic synthesis of polynucleotides on a solid support using double cleavage to produce scarless polynucleotides. In particular, methods are disclosed that use an initiator that comprises a cleavable group, which can be cleaved by a small molecule chemical agent, adjusting pH, heat, or photocleaved by illumination with light to release polynucleotides from a solid support after enzymatic synthesis is completed, and an enzymatic cleavage site, which can be cleaved by a cleavage enzyme to remove polynucleotide scars.

专利号:US-6998484-B2
优先权日:2000-10-04
标 题:Synthesis of purine locked nucleic acid analogues
发明人：KOCH TROELS; JENSEN FLEMMING REISSIG
权利人:SANTARIS PHARMA AS
摘要:The present invention relates to a new method for the synthesis of purine LNA (Locked Nucleic Acid) analogues which provides a higher overall yield. The method comprising a regioselective 9-N purine glycosylation reaction followed by a one-pot nucleophilic aromatic substitution reaction of the 6-substituent in the purine ring and simultaneous nucleophile-induced intramolecular ring closure of the C-branched carbohydrate to form novel purine LNA analogues. The novel strategy is illustrated by the synthesis of the novel compound (1S,3R,4R,7S)-7-benzyloxy-1-methanesulfonylmethyl-3-(guanin-9-yl)-2,5-dioxabicyclo[2.2.1]heptane which is easily converted into (1S,3R,4R,7S)-7-hydroxy-1-hydroxymethyl-3-((2-N-isobutyrylguanin-9-yl)-2,5-dioxabicyclo[2.2.1]heptane after isobutyryl protection of the 2-amino purine group and subsequent substitution of 1-methanesulfonyl with benzoate, debenzoylation and debenzylation.