Liquid–Liquid Extraction Protocol for the Removal of Aldehydes and Highly Reactive Ketones from Mixtures
作者:Maria M. Boucher、Maxwell H. Furigay、Phong K. Quach、Cheyenne S. Brindle
DOI:10.1021/acs.oprd.7b00231
日期:2017.9.15
The reaction of the bisulfite ion with aldehydes to form charged bisulfite adducts is a well-established method for the purification of aldehydes. This reaction has been modified to create a convenient liquid–liquid extraction method for the removal of aldehydes from mixtures. The use of a water-miscible solvent allows the reaction to occur during a simple 30 s shaking protocol by increasing the contact
Bisulfite Addition Compounds as Substrates for Reductive Aminations in Water
作者:Xiaohan Li、Karthik S. Iyer、Ruchita R. Thakore、David K. Leahy、J. Daniel Bailey、Bruce H. Lipshutz
DOI:10.1021/acs.orglett.1c02604
日期:2021.9.17
Highly valued products resulting from reductive aminations utilizing shelf-stable bisulfiteadditioncompounds of aldehydes can be made under aqueous micellar catalysis conditions. Readily available α-picolineborane serves as the stoichiometric hydride source. Recycling of the aqueous reaction medium is easily accomplished, and several applications to targets in the pharmaceutical industry are documented
Phosphoryl Chloride Mediated Synthesis of 5-Arylidene-2,4-Thiazolidinediones Derivatives via Aromatic Bisulfite Adducts
作者:Sandeep Mohanty、Sandeep G、Arun Karmakar
DOI:10.2174/15701786113106660081
日期:2014.2
The carbon-carbon bond formation by the condensation of bisulfite adduct of aromatic aldehydes with
thiazolidine-2, 4-dione to furnish 5-arylidene-2,4-thiazolidinedione’s has been investigated. This novel methodology was
applied to convert substituted aryl bisulfite adducts to corresponding 5-arylidene-2,4-thiazolidinedione’s with POCl3 in
less-polar solvents such as toluene, chlorobenzene and o-xylene. 5-(4-methoxybenzylidene)thiazolidine-2,4-dione and
5-(4-ethoxybenzylidene)thiazolidine-2,4-dione were obtained in good yields.
Novel Clarithromycin Analogs with C-4” 2-arylbenzimidazolyl Bishydrazide Side Chain: Synthesis and Antibacterial Evaluation
作者:Yunkun Qi、Ruixin Ma、Xin Li、Yue Hu、Siti Ma、Chao Cong、Xiaodong Ma、Wenping Cui、Shutao Ma
DOI:10.2174/157018011797655269
日期:2011.12.1
A series of novel 4” -O-2-arylbenzimidazolyl derivatives of clarithromycin were synthesized and evaluated. These 4” -O-2-arylbenzimidazolyl derivatives demonstrated excellent activity against erythromycin-susceptible strains and showed remarkably improved activity against erythromycin-resistant strains compared with the references. In particular, compound 7c, which possesses the terminal 2-(2-methoxyphenyl)benzimidazolyl group on the C-4” bishydrazide side chain, not only presented the most potent activity against erythromycin-susceptible Streptococcus pneumoniae ATCC49619 and Staphylococcus aureus ATCC25923, exhibiting 4-fold and 4-fold higher efficacy than the parent clarithromycin, but also displayed the highest activity against erythromycin-resistant Streptococcus pneumoniae expressing the mef gene and the erm gene, which was 133-fold and 32-fold better than clarithromycin or azithromycin, respectively.
according to which two hydrogen bond acceptors and one hydrophobic aromatic feature are shared by all molecular series in binding the viral polymerase. The pharmacophoric information was used to retrieve a putative binding site on the surface of the BVDV RdRp and to guide compound docking within the protein binding site. The affinity of all compounds towards the enzyme was scored via molecular dynamics-based