3082-71-1

Upstream product

• 938-16-9 2,2-dimethylpropiophenone 
• 197709-53-8 (E)-(S)-(-)-O-(1-phenylbutyl) pivaldehyde oxime 
• 591-51-5 phenyllithium 
• 57768-77-1 phenyl tert-butyl ketene 
• 676268-31-8 (1R,1'S)-(-)-N-(1-phenylbutoxy)-2,2-dimethyl-1-phenylpropylamine 
• 594-19-4 tert.-butyl lithium 
• 104-87-0 4-methyl-benzaldehyde 
• 180479-44-1 ((R)-2,2-Dimethyl-1-phenyl-propyl)-((S)-2-methoxymethyl-2,3-dihydro-indol-1-yl)-amine 
• 26919-84-6 (R)-(-)-α-tert.-Butyl-phenylacetamid 
• 61501-04-0 2,2-dimethyl-1-phenyl-propylamine 

Downstream Products

• 131829-64-6 2-<(2,2-dimethyl-1-phenylpropyl)amino>propanenitrile 
• 131703-43-0 2-<(2,2-dimethyl-1-phenylpropyl)amino>propanenitrile 
• 2975-91-9 (R)-(+)-N-acetyl-2,2-dimethyl-1-phenylpropylamine 
• 681513-50-8 C₂₂H₂₇N₅O₃S 

Relevant academic research and scientific papers

Amine Transaminase Engineering for Spatially Bulky Substrate Acceptance

Amine transaminase (ATA) catalyzing stereoselective amination of prochiral ketones is an attractive alternative to transition metal catalysis. As wild-type ATAs do not accept sterically hindered ketones, efforts to widen the substrate scope to more challenging targets are of general interest. We recently designed ATAs to accept aromatic and thus planar bulky amines, with a sequence-based motif that supports the identification of novel enzymes. However, these variants were not active against 2,2-dimethyl-1-phenyl-propan-1-one, which carries a bulky tert-butyl substituent adjacent to the carbonyl function. Here, we report a solution for this type of substrate. The evolved ATAs perform asymmetric synthesis of the respective R amine with high conversions by using either alanine or isopropylamine as amine donor.

Comparative Study of Bifunctional Mononuclear and Dinuclear Amidoiridium Complexes with Chiral C?N Chelating Ligands for the Asymmetric Transfer Hydrogenation of Ketones

A series of new bifunctional C?N chelating Ir complexes possessing a metal/NH group was synthesized by cyclometalation of optically active primary benzylic amines such as O-silylated (S)-2-amino-2-phenylethanols (1 a and 1 a’), (R)-5-amino-6,7,8,9-tetrahydro-5H-benzocycloheptene (1 b), and (R)-1-phenyl-2,2-dimethylpropylamine (1 c). Although treatment of KOtBu with the amine complexes originating from 1 a and 1 a’ afforded amido-bridged dinuclear complexes (3 a and 3 a’), more sterically hindered complexes were solely transformed into the coordinatively unsaturated mononuclear amido complexes (3 b and 3 c), which can serve as real catalyst species in the asymmetric transfer hydrogenation. The structural difference in the C?N chelate framework markedly affected the catalytic performance. Among them, amido complex 3 c showed a pronounced ability to catalyze the transfer hydrogenation of acetophenone in 2-propanol, even at a low temperature of ?30 °C. A hydridoiridium complex (4 c) was also identified in the reaction of 3 c in 2-propanol, which provides mechanistic insights into the enantiodiscriminating step in the hydrogen transfer to prochiral ketones.

Enantioselective synthesis of protected amines by the catalytic asymmetric addition of hydrazoic acid to ketenes

(Chemical Equation Presented) A-mine of possibilities: An effective method for the conversion of achiral ketenes into enantioenriched protected amines was developed by tuning the structure and reactivity of a catalyst on the basis of a mechanistic hypothe

Selective diethylzinc reduction of imines in the presence of ketones catalyzed by Ni(acac)2

(Chemical Equation Presented) A selective reduction method of an electronically deficient imine in the presence of ketone was developed by employing Et2Zn and 5 mol % of Ni(acac)2. The method was applied in the reduction of SS-tert-butanesulfinyl ketimines 1 to afford amines 2 in 23-92% yields and 73:27 to 98:2 diastereoselectivities. A plausible mechanism was proposed on the basis of an NMR study.

Asymmetric synthesis of N-protected amino acids by the addition of organolithium carboxyl synthons to ROPHy/SOPHy-derived aldoximes and ketoximes.

A new asymmetric synthesis of alpha-amino acids is described in which the key step is the highly diastereoselective addition of organolithium carboxyl synthons (2-furyllithium, phenyllithium, vinyllithium) to (R)- and (S)-O-(1-phenylbutyl) oximes to give hydroxylamines, with vinyllithium being the most satisfactory nucleophilic reagent. Subsequent reductive cleavage of the N-O bond in hydroxylamines, followed by N-protection, and oxidative cleavage of the carboxyl precursor gave a range of N-protected amino acids and esters. The method was exemplified by the synthesis of a range of derivatives of non-proteinogenic amino acids such as 4-bromophenylalanine, tert-leucine, norvaline, cyclohexyl- and aryl-glycines, 2-amino-8-oxodecanoic acid (Aoda) and alpha-methylvaline.

THIADIAZOLEDIOXIDES AND THIADIAZOLEOXIDES AS CXC- AND CC-CHEMOKINE RECEPTOR LIGANDS

Disclosed are novel compounds of the formula (IA) and the pharmaceutically acceptable salts and solvates thereof. Examples of groups comprising Substituent A include heteroaryl, aryl, heterocycloalkyl, cycloalkyl, aryl, alkynyl, alkenyl, aminoalkyl, alkyl or amino. Examples of groups comprising Substituent B include aryl and heteroaryl. Also disclosed is a method of treating a chemokine mediated diseases, such as, cancer, angiogenisis, angiogenic ocular diseases, pulmonary diseases, multiple sclerosis, rheumatoid arthritis, osteoarthritis, stroke and cardiac reperfusion injury, acute pain, acute and chronic inflammatory pain, and neuropathic pain using a compound of formula (IA).

3,4-Di-substituted cyclobutene-1,2-diones as CXC-chemokine receptor ligands

There are disclosed compounds of the formula or a pharmaceutically acceptable salt or solvate thereof which are useful for the treatment of chemokine-mediated diseases such as acute and chronic inflammatory disorders and cancer.

3,4-Di-substituted cyclobutene-1,2-diones as CXC-chemokine receptor ligands

There are disclosed compounds of the formula or a pharmaceutically acceptable salt or solvate thereof which are useful for the treatment of chemokine-mediated diseases such as acute and chronic inflammatory disorders and cancer.

Asymmetric synthesis of α-branched primary amines on solid support via novel hydrazine resins

Matrix presented Two novel chiral hydrazine resins for asymmetric solid-phase synthesis have been developed. The enantiopure β-methoxyamino auxiliaries, derived from frans-4-hydroxy-(S) -proline and (R) -leucine, were attached to Merrifield resin and transformed into their corresponding hydrazines. Immobilization of various aldehydes, followed by 1,2-addition of organolithium reagents to the resulting enantiopure hydrazones and reductive cleavage from the solid support, furnished α-branched amines, which were isolated as their corresponding amides in good overall yields and enantiomeric excesses of up to 86%.

Diastereoselective addition of organolithiums to new chiral hydrazones. Enantioselective synthesis of (R)-coniine

The reactions of organolithiums with the new chiral hydrazones derived from (S)-indoline-2-carboxylic acid afforded chiral hydrazines with high diastereoselectivities (up to 99% de) and the present method was utilized for the preparation of high optically pure (R)-coniine (94% ee).