99440-98-9

Upstream product

• 694-28-0 2-chlorocyclopentanone 
• 2987-17-9 cyclobutylaldehyde 
• 63703-33-3 dimethoxy-2,2 cyclopentanol-1 
• 19980-43-9 1-(trimethylsilyloxy)cyclopentene 
• 120-92-3 cyclopentanone 
• 930-46-1 (1R,2R)-cyclopentane-1,2-diol 
• 1670-46-8 2-acetylcyclopentanaone 
• 6838-66-0 1,2-bis((trimethylsilyl)oxy)cyclopent-1-ene 
• 33092-86-3 trans-2-aminocyclopentanol 
• 1402704-77-1 C₁₃H₁₁NO₃ 
• 111-30-8 Glutaraldehyde 
• 694-27-9 5-bromo-cyclopent-2-en-1-one 
• 930-30-3 cyclopent-2-enone 
• 818-38-2 Diethyl glutarate 

Downstream Products

• 83196-16-1 (+/-)-2-cyclopentanone 
• 5057-98-7 cis-1,2-cyclopentanediol 
• 99493-88-6 (R)-2-hydroxycyclopentanone 
• 147333-12-8 (2S)-2-hydroxycyclopentan-1-one 
• 5057-99-8 trans-cyclopentane-1,2-diol 
• 6026-86-4 methyl 4-formylbutanoate 
• 59058-16-1 2-(benzoyloxy)cyclopentanone 
• 110-94-1 1,5-pentanedioic acid 
• 605653-10-9 C₁₃H₂₄O₄ 
• 339362-68-4 2-aminocyclopentanone 
• 1374422-09-9 (2R)-2-hydroxy-2-[(R)-hydroxy(4-nitrophenyl)methyl]cyclopentanone 
• 1374422-04-4 (2R)-2-hydroxy-2-[(S)-hydroxy(4-nitrophenyl)methyl]cyclopentanone 
• 1121-05-7 2,3-dimethylcyclopent-2-enone 
• 133870-04-9 (2R^*,3aR^*,7aR^*)-hexahydro-2-<(benzyloxy)methyl>-4(2H)-benzofuranone 

Relevant academic research and scientific papers

Novel hypervalent iodine catalyzed synthesis of α-sulfonoxy ketones: Biological activity and molecular docking studies

The novel di((camphorsulfonyl)oxy)iodo]benzene (DCIB) was synthesized from [Bis(trifluoroacetoxy)iodo]benzene in the mild conditions. The α-sulfonoxylation of various ketones with novel hypervalent iodine was reported in excellent yield. α-Hydroxyketones

Enantioselective Cascade Biocatalysis for Deracemization of Racemic β-Amino Alcohols to Enantiopure (S)-β-Amino Alcohols by Employing Cyclohexylamine Oxidase and ω-Transaminase

Optically active β-amino alcohols are very useful chiral intermediates frequently used in the preparation of pharmaceutically active substances. Here, a novel cyclohexylamine oxidase (ArCHAO) was identified from the genome sequence of Arthrobacter sp. TYUT010-15 with the R-stereoselective deamination activity of β-amino alcohol. ArCHAO was cloned and successfully expressed in E. coli BL21, purified and characterized. Substrate-specific analysis revealed that ArCHAO has high activity (4.15 to 6.34 U mg?1 protein) and excellent enantioselectivity toward the tested β-amino alcohols. By using purified ArCHAO, a wide range of racemic β-amino alcohols were resolved, (S)-β-amino alcohols were obtained in >99 % ee. Deracemization of racemic β-amino alcohols was conducted by ArCHAO-catalyzed enantioselective deamination and transaminase-catalyzed enantioselective amination to afford (S)-β-amino alcohols in excellent conversion (78–94 %) and enantiomeric excess (>99 %). Preparative-scale deracemization was carried out with 50 mM (6.859 g L?1) racemic 2-amino-2-phenylethanol, (S)-2-amino-2-phenylethanol was obtained in 75 % isolated yield and >99 % ee.

Ligustrazine-fused cyclic compound and medicine composition thereof, as well as application in medicine thereof

The invention discloses a ligustrazine-fused cyclic compound and a medicine composition thereof and application in a medicine. The ligustrazine-fused cyclic compound has the following structural general formula I: as shown in the specification. The medicine composition is a medicinal active component for the ligustrazine-fused cyclic compound and a pharmaceutically acceptable carrier, an excipient, a diluent, an adjuvant, a medium or a combination thereof; the ligustrazine-fused cyclic compound and the medicine composition can be used for preventing or treating cardiovascular and cerebrovascular diseases, digestive system diseases, respiratory diseases, the alzheimer's disease, kidney diseases and complications of the above-mentioned diseases due to thrombus and excessive free radicals. The ligustrazine-fused cyclic compound disclosed by the invention has an extremely good inhibition effect on in vitro ADP (adenosine diphosphate)-induced platelet aggregation; meanwhile, compared with the pharmacokinetic property of ligustrazine serving as a female parent, the pharmacokinetic property of the ligustrazine-fused cyclic compound in the body of a rat is obviously improved.

Reactions of hydrogen peroxide with acetylacetone and 2- acetylcyclopentanone

A reaction of acetylacetone with equimolar amount of concentrated aqueous H2O2 in both organic solvents (ButOH, AcOH) and water at various temperatures gave the corresponding 3,5-dihydroxy-1,2- dioxolanes with different configuration of stereogenic centers. In the pres-ence of an excess of H2O2, 3,5-dihydroxy-1,2-dioxolanes were converted to a mixture of 5-hydroperoxy-3-hydroxy-1,2-dioxolanes and further to a mixture of dimeric 1,2-dioxolan-3-ylperoxides. All the peroxides formed exist in solutions as equilibrium mixtures with the starting reagents. A prolonged reflux of solutions of 3,5-dihydroxy-1,2-dioxolanes in ButOH in the presence of a large excess of H2O2 led to the skeletal rearrangements of the substrates to a mixture of propionic acid and hydroxyacetone, which underwent further oxidative transfor-mations. Unlike acetylacetone, 2-acetylcyclopentanone reacted with H2O2 in aqueous phase or in solutions in ButOH under thermodynamic or kinetic control with the formation of the corresponding 5-hydroperoxy-3-hydroxy- 1,2-dioxolanes, rather than 3,5-dihydroxy-1,2-di-oxolanes. Thermodynamically controlled process in solution in AcOH gave a mixture of all four possible hydroperoxyhydroxy-1,2-dioxolanes. These cyclic peroxides in solutions in ButOH or AcOH readily converted to a mixture of AcOH, glutaric, α-methyladipic, and α-hydroxy-α-methyladipic acids. An active α-hydroxylation of the substrate was observed upon reflux of a solution of 2-acetylcyclopentanone and H2O2 in AcOH.

An efficient method for selective oxidation of 1,2-diols in water catalyzed by Me2SnCl2

Dimethyltin(iv)dichloride-catalyzed selective oxidation of 1,2-diols in water was achieved using dibromoisocyanuric acid (DBI) or Br2 as oxidants. The catalyst activates the 1,2-diol moiety through the formation of stannylene acetal in addition to enhancing selectivity. Various cyclic and acyclic 1,2-diol substrates have been selectively oxidized affording α-hydroxyketones in good to excellent yields. This method is safe and simple in operation.

Preparation of α-oxygenated ketones by the dioxygenation of alkenyl boronic acids

Two in two: Dioxygenation of alkenyl boronic acids has been achieved with N-hydroxyphthalimide. The two-step process involves etherification of an alkenyl boronic acid with N-hydroxyphthalimide followed by a [3,3] rearrangement. The dioxygenated product can then be hydrolyzed to form either the corresponding α-hydroxy ketone or the α-benzoyloxy ketone. Copyright

Cu(II)-catalyzed acylation by thiol esters under neutral conditions: Tandem acylation-wittig reaction leading to a one-pot synthesis of butenolides

The first catalytic acylation of alcohols with a thiol ester present in Wittig reagents under neutral conditions catalyzed by the Cu(II) salt through a push-pull mechanism is reported. Furthermore, a new methodology for the one-pot lactonization of acyloins by a copper catalyst is developed. The synthetic utility of this method for the synthesis of natural products is shown.

Efficient oxidation of 1,2-diols into a-hydroxyketones catalyzed by organotin compounds

Electrochemical oxidation of 1,2-diols with a catalytic amount of an organotin compound and a bromide ion as mediators has been developed. Various cyclic and acyclic 1,2-diols were oxidized into the corresponding α-hydroxyketones in good to excellent yields without C-C bond cleavage. Also, oxidation with the use of chemical oxidants was accomplished in the presence of a catalytic amount of an organotin compound. These reactions could discriminate 1,2-diols from isolated hydoxyl groups or 1,3-diols. In the case of a conformationally restricted cyclic 1,2-diol, the axial hydroxyl group was oxidized exclusively. Mono-, di-, and trialkylated tin compounds were examined as mediators and dialkylated tin compounds showed higher catalytic activity than mono- and trisubstituted ones. Me2SnCl2 was found to be the most suitable mediator for the selective oxidation..

METHOD AND COMPOSITIONS FOR TREATING HIV INFECTIONS

Described herein are compounds and compositions that are useful in the treatment of HIV, AIDS, and AIDS-related diseases. In addition, compounds are described herein that are capable of inhibiting the dimerization of HIV proteases.

Microwave-assisted synthesis of α-hydroxy ketone and α-diketone and pyrazine derivatives from α-halo and α,α′-dibromo ketone

A novel reaction of α-halo ketone (α-bromo and α-chloro ketone) with irradiation under microwave gave the corresponding α-hydroxyketone and pyrazine derivative in good yields. In the case of α,α′-dibromo ketone, α-diketone was obtained. This reaction affords a new, clean and convenient synthetic method for α-hydroxyketone, α-diketone, α-chloro ketone and pyrazine derivative.