[EN] NUCLEOSIDE PRODRUGS AND USES RELATED THERETO<br/>[FR] PROMÉDICAMENTS NUCLÉOSIDIQUES ET LEURS UTILISATIONS
申请人:UNIV EMORY
公开号:WO2021035214A1
公开(公告)日:2021-02-25
Disclosed are acyclic nucleoside prodrugs with improved metabolic stability and oral bioavailability. In general, the prodrugs are derivatives of acyclic nucleoside phosphonates containing a lipid-like moiety that can increase oral absorption and subsequent stability in the liver and plasma. Preferably, the lipid-like moiety can resist enzyme-mediated ω-oxidation, such as ω -oxidation catalyzed by cytochrome P450 enzymes. Also disclosed are pharmaceutical formulations of the acyclic nucleoside prodrugs. The acyclic nucleoside prodrugs and pharmaceutical formulations thereof can be used to treat viral infections, such as HIV infections, and/or viral-associated cancer, such as HPV-associated cancers.
Isothiazolyl substituted glycerol derivatives containing phosphate groups
申请人:Sankyo Company, Limited
公开号:US05068340A1
公开(公告)日:1991-11-26
Glycerol derivatives having at least one heterocyclic group on the 1 or 2 position are PAF antagonists which may be used to treat asthma, inflammation and shock.
在1或2位置上至少具有一个杂环基团的甘油衍生物是PAF拮抗剂,可用于治疗哮喘,炎症和休克。
Glycerol derivatives, their preparation and their therapeutic use
申请人:Sankyo Company Limited
公开号:EP0238202A2
公开(公告)日:1987-09-23
Glycerol derivatives having at least one heterocyclic group on the 3 or 2 position and a group of formula -Y-D-Q on the 1 position (in which Y represents oxygen, sulphur, -NR3-, -X-CO-R'-, -R4-CO-X-, -NR'-CO-, -CO-NR3-or -X-P-(O) (OH)-O-, where -NR3-is optionally protected imino, R4 represents a direct bond or -NR3; and X represents oxygen or sulphur; D represents optionally substituted C1-C14 alkylene; and Q represents a nitrogen-containing heterocyclic group or an amino group either of which is optionally quatemized) are PAF antagonists which may be used to treat asthma, inflammation and shock. They may be prepared by reacting a glycerol derivative having an active group at the 1-position with an appropriate compound to introduce the desired group.
Total Syntheses of (−)-Grandinolide and (−)-Sapranthin by the Sharpless Asymmetric Dihydroxylation of Methyltrans-3-Pentenoate: Elucidation of the Stereostructure of (−)-Sapranthin
Methyl trans-3-pentenoate (7) was converted into the cis-substituted gamma-lactone 8 in a single step with 78 % ee. The derived enolate dilithio-8 was alkylated trans-selectively with primary iodoalkanes. with 1-iodobutane dilithio-8 afforded, after esterification with isovaleroyl chloride, the epi-blast mycinone 9, Dilithio-8 gave (-)-grandinolide (11) with 1-iodo-19-phenylnonadecane (20), A third trans-selective alkylation of dilithio-8 was undertaken with 16-iodo-1.5-hexadecadiene-7,9-diyne (21). This gave the gamma-lactone 12. which had the published relative configuration of (-)-sapranthin but different spectroscopic data, When the OH group of lactone 8 was inverted (to hydroxylactone 40) and the derived enolate dilithio-40 alkylated with iodide 21, lactone 41 resulted, Its H-1 and C-13 NMR spectra and the sign and value of optical rotation coincide with the data of natural sapranthin, These findings establish that (-)-sapranthin possesses the relative and absolute configuration of stereoformula 41. The synthesis of iodide 21 was performed via the dienoic carboxylic ester trans-23 which stemmed from the Claisen-Ireland rearrangement (27 --> 28/29)/esterification (28/29 --> 26)/Cope rearrangement (26 - 23) sequence shown in Scheme 5.