Synthesis of new C2-symmetric bioxazoles and application as chiral ligands in asymmetric hydrosilylation
作者:Sang-gi Lee、Chung Woo Lim、Choong Eui Song、In O Kim、Chul-Ho Jun
DOI:10.1016/s0957-4166(97)00353-4
日期:1997.9
chirality on their backbone, were synthesized efficiently starting from L-tartaric acid. The structure of 3a was determined by X-ray crystal structure analysis. With these novel chiral bioxazole ligands, as a preliminary investigation for their effects on the enantioselectivity, rhodium(I)-catalyzed enantioselective hydrosilylations of acetophenone were carried out.
Efficient synthesis of (2R,3R)- and (2S,3S)-2,3-diaminobutane-1,4-diol and their dibenzyl ethers
作者:Andreas Scheurer、Paul Mosset、Rolf W Saalfrank
DOI:10.1016/s0957-4166(97)00086-4
日期:1997.4
(2R,3R)-2,3-Diaminobutane-1,4-diol 6 and its dibenzyl ether 7 were efficiently synthesized starting from L-tartaric acid 1a. The crucial step, debenzylation of intermediate dibenzyloxydiazide 4, was accomplished in good yield by boron trichloride-dimethyl sulfide complex. The enantiomeric series was similarly obtained starting from D-tartaric acid.
Synthesis of chiral 2,3-disubstituted 1,4-diazabicyclo [2.2.2] octane. New ligand for the osmium-catalyzed asymmetric dihydroxylation of olefins
作者:Tohru Oishi、Masahiro Hirama
DOI:10.1016/s0040-4039(00)92331-1
日期:1992.1
Chiral 2,3-disubstituted 1,4-diazabicyclo[2.2.2]octane (DABCO) derivatives have been synthesized and utilized as a chiral ligand for the osmium-catalyzed asymmetricdihydroxylation of olefins. Optically active diols in up to 41%ee are obtained in good yields.
The present application relates to a compound having the formula (I)
A-L-B (I)
wherein
A is represented by
L is a bond or a self-immolative spacer;
B is represented by
The compound is capable of releasing molecular cargo in the presence of a reductase and is thus suitable for treating, ameliorating, preventing or diagnosing a disorder selected from a neoplastic disorder; atherosclerosis; an autoimmune disorder; an inflammatory disease; a chronic inflammatory autoimmune disease; ischaemia; and reperfusion injury.
Piperazine-Fused Cyclic Disulfides Unlock High-Performance Bioreductive Probes of Thioredoxins and Bifunctional Reagents for Thiol Redox Biology
作者:Lukas Zeisel、Jan G. Felber、Karoline C. Scholzen、Carina Schmitt、Alexander J. Wiegand、Leonid Komissarov、Elias S.J. Arnér、Oliver Thorn-Seshold
DOI:10.1021/jacs.3c11153
日期:2024.2.28
six-membered-cyclic disulfides as redox substrates that unlock best-in-class bioreduction probes for live cell biology, since their self-immolation after reduction is unprecedentedly rapid. We develop scalable, diastereomerically pure, six-step syntheses that access four key cis- and trans-piperazine-fused cyclic dichalcogenides without chromatography. Fluorogenic redox probes using the disulfide piperazines