Furan Approach to Vitamin D Analogues. Synthesis of the A-Ring of Calcitriol and 1α-Hydroxy-3-deoxyvitamin D3
摘要:
The A-rings of calcitriol (1 alpha,25-dihydeoxyvitamin D-3) and 1 alpha-hydroxy-3-deoxyvitamin D-3 were synthesized using the furan approach The critical steps in the synthesis of the A-ring of calcitriol involved an asymmetric carbonyl-ene reaction of 3-methylene-2,3-dihydrofuran with 3-(tert-butyldimethylsiloxy)-propanal. a diostereoselective Friedel-Crafts hydroxyalkylation an oxidation of the 2.3-disubstituted furan to give a gamma-hydroxybutenolide and a Peterson olefinatiion The A-ring (Z)-dienol of calcitriol was synthesized in 12 steps from 3-(tert-butyldimethylsiloxy)propanal in 17% yield
Furan Approach to Vitamin D Analogues. Synthesis of the A-Ring of Calcitriol and 1α-Hydroxy-3-deoxyvitamin D3
摘要:
The A-rings of calcitriol (1 alpha,25-dihydeoxyvitamin D-3) and 1 alpha-hydroxy-3-deoxyvitamin D-3 were synthesized using the furan approach The critical steps in the synthesis of the A-ring of calcitriol involved an asymmetric carbonyl-ene reaction of 3-methylene-2,3-dihydrofuran with 3-(tert-butyldimethylsiloxy)-propanal. a diostereoselective Friedel-Crafts hydroxyalkylation an oxidation of the 2.3-disubstituted furan to give a gamma-hydroxybutenolide and a Peterson olefinatiion The A-ring (Z)-dienol of calcitriol was synthesized in 12 steps from 3-(tert-butyldimethylsiloxy)propanal in 17% yield
Provided herein are, inter alia, methods for linking an mRNA molecule to a polypeptide (e.g., a peptide or a protein) by linking the mRNA molecule to a linking amino acid in the polypeptide, or by linking the mRNA molecule to a linking tRNA to which the polypeptide is attached, via reactions not catalyzed by the ribosome, and methods for making polypeptide libraries. Also provided are mRNA-protein complexes and mRNA-tRNA-protein complexes, libraries containing these complexes, and methods of using these complexes.
[EN] PROTEIN AND PEPTIDE LIBRARIES<br/>[FR] BANQUES DE PROTÉINES ET DE PEPTIDES
申请人:GEN HOSPITAL CORP
公开号:WO2013019794A1
公开(公告)日:2013-02-07
Provided herein are, inter alia, methods for linking an mRNA molecule to a polypeptide (e.g., a peptide or a protein) by linking the mRNA molecule to a linking amino acid in the polypeptide, or by linking the mRNA molecule to a linking tRNA to which the polypeptide is attached, via reactions not catalyzed by the ribosome, and methods for making polypeptide libraries. Also provided are mRNA-protein complexes and mRNA-tRNA-protein complexes, libraries containing these complexes, and methods of using these complexes.
[EN] COMBINATION OF INTRACELLULAR AND EXTRACELLULAR PHOTOSENSITIZERS FOR TREATMENT OF BACTERIAL INFECTION<br/>[FR] COMBINAISON DE PHOTOSENSIBILISATEURS INTRACELLULAIRE ET EXTRACELLULAIRE DE TRAITEMENT D'UNE INFECTION BACTÉRIENNE
申请人:[en]VANDERBILT UNIVERSITY
公开号:WO2022165023A1
公开(公告)日:2022-08-04
A method of inducing death or inhibiting growth or reproduction of a Gram-positive bacterial cell involves contacting the bacterial cell with a coproporphyrinogen oxidase (CgoX) activator, thereby promoting accumulation of coproporphyrin III (CPIII) in the bacterial cell, where the CPIII serves as an intracellular photosensitizer; contacting the bacterial cell with a photosensitizer conjugated to an iron-regulated surface determinant (Isd) protein targeting moiety, which Isd proteins are expressed on the service of the bacterial cell such that the conjugated photosensitizer serves as an extracellular photosensitizer; exposing the bacterial cell to light having a first excitation wavelength of the intracellular photosensitizer; and exposing the bacterial cell to light having a second excitation wavelength of the extracellular photosensitizer.
Furan Approach to Vitamin D Analogues. Synthesis of the A-Ring of Calcitriol and 1α-Hydroxy-3-deoxyvitamin D<sub>3</sub>
作者:William H. Miles、Katelyn B. Connell、Gözde Ulas、Hannah H. Tuson、Elizabeth A. Dethoff、Varun Mehta、April J. Thrall
DOI:10.1021/jo101155c
日期:2010.10.15
The A-rings of calcitriol (1 alpha,25-dihydeoxyvitamin D-3) and 1 alpha-hydroxy-3-deoxyvitamin D-3 were synthesized using the furan approach The critical steps in the synthesis of the A-ring of calcitriol involved an asymmetric carbonyl-ene reaction of 3-methylene-2,3-dihydrofuran with 3-(tert-butyldimethylsiloxy)-propanal. a diostereoselective Friedel-Crafts hydroxyalkylation an oxidation of the 2.3-disubstituted furan to give a gamma-hydroxybutenolide and a Peterson olefinatiion The A-ring (Z)-dienol of calcitriol was synthesized in 12 steps from 3-(tert-butyldimethylsiloxy)propanal in 17% yield