65943-49-9

Upstream product

• 2749-11-3 (S)-Alaninol 
• 100-52-7 benzaldehyde 

Downstream Products

• 6940-80-3 (S)-N-benzylalaninol 
• 458560-73-1 (S)-N-benzyl-2-amino-1-fluoropropane 
• 458560-69-5 (S)-3-benzyl-4-methyl-1,2,3-oxathiazolidine-2-oxide 
• 458560-71-9 (S)-3-benzyl-4-methyl-[1,2,3]-oxathiazolidine-2,2-dioxide 
• 197020-98-7 (S)-N-(1-Allyloxyprop-2-yl)-benzylamin 
• 225939-68-4 (S)-N-(1-Allyloxyprop-2-yl)-benzylidenamin-N-oxid 
• 1375061-49-6 C₁₇H₂₇NO₄ 
• 119128-21-1 (5S)-5-methyl-4-(phenylmethyl)-3-morpholinone 
• 120800-91-1 (3S)-3-methyl-4-(phenylmethyl)morpholine 
• 563539-39-9 (2R,3S,4S)-(1-benzyl-2-cyano-4-methyl-azetidin-3-yl)-acetic acid ethyl ester 
• 563539-38-8 (2S,3S,4S)-(1-benzyl-2-cyano-4-methyl-azetidin-3-yl)-acetic acid ethyl ester 
• 563539-36-6 (2E,4S)-4-(benzyl-cyanomethyl-amino)-pent-2-enoic acid ethyl ester 
• 152673-15-9 (S)-N-benzyl-N-cyanomethyl-2-aminopropan-1-ol 
• 152673-16-0 (S)-N-(1-chloro-2-propyl)-N-cyanomethylbenzylamine 

Relevant academic research and scientific papers

Optically active, amphiphilic poly(meta -phenylene ethynylene)s: Synthesis, hydrogen-bonding enforced helix stability, and direct AFM observation of their helical structures

Optically active, amphiphilic poly(meta-phenylene ethynylene)s (PPEa) bearing l- or d-alanine-derived oligo(ethylene glycol) side chains connected to the backbone via amide linkages were prepared by microwave-assisted polycondensation. PPEa's exhibited an intense Cotton effect in the π-conjugated main-chain chromophore regions in various polar and nonpolar organic solvents due to a predominantly one-handed helical conformation stabilized by an intramolecular hydrogen-bonding network between the amide groups of the pendants. The stable helical structure was retained in the bulk and led to supramolecular column formation from stacked helices in oriented polymer films as evidenced by X-ray diffraction. Atomic force microscopy was used to directly visualize the helical structures of the polymers in two-dimensional crystalline layers with molecular resolution, and, for the first time, their absolute helical senses could unambiguously be determined.

Structure-based design of potent and selective 3-phosphoinositide-dependent kinase-1 (PDK1) inhibitors

Phosphoinositide-dependent protein kinase-1(PDK1) is a master regulator of the AGC family of kinases and an integral component of the PI3K/AKT/mTOR pathway. As this pathway is among the most commonly deregulated across all cancers, a selective inhibitor of PDK1 might have utility as an anticancer agent. Herein we describe our lead optimization of compound 1 toward highly potent and selective PDK1 inhibitors via a structure-based design strategy. The most potent and selective inhibitors demonstrated submicromolar activity as measured by inhibition of phosphorylation of PDK1 substrates as well as antiproliferative activity against a subset of AML cell lines. In addition, reduction of phosphorylation of PDK1 substrates was demonstrated in vivo in mice bearing OCl-AML2 xenografts. These observations demonstrate the utility of these molecules as tools to further delineate the biology of PDK1 and the potential pharmacological uses of a PDK1 inhibitor.

PROCESS FOR PRODUCTION OF OPTICALLY ACTIVE FLUOROAMINE

Disclosed is a process for producing a protected optically active fluoroamine, which comprises the step of reacting an imine-protected optically active hydroxyamine, an oxazolidine-protected optically active hydroxyamine, or a mixture of the imine-protected optically active hydroxyamine and the oxazolidine-protected optically active hydroxyamine, with sulfuryl fluoride (SO2F2) in the presence of a tertiary amine having a carbon number of 7 to 18 (produced by substituting all of three hydrogen atoms in ammonia by alkyl groups). The desired optically active fluoroamine can be produced by hydrolyzing the protected optically active fluoroamine under acidic conditions.

Stereocontrolled synthesis of 3-substituted azetidinic amino acids

A set of enantiomerically pure N-disubstituted β-amino alcohols was chlorinated by treatment with thionyl chloride. This reaction gave a mixture of regioisomeric chlorides that could be equilibrated to the more stable regioisomer by heating in DMF. The chlorides thus obtained were engaged in an intramolecular anionic ring-closure and gave access to fully protected enantio- and diastereomerically pure 2,3-cis-disubstituted azetidinic amino acids. One of the latter was deprotected and included in a short peptide sequence. Georg Thieme Verlag Stuttgart.

Azetidinic amino acids: Stereocontrolled synthesis and pharmacological characterization as ligands for glutamate receptors and transporters

A set of ten azetidinic amino acids, that can be envisioned as C-4 alkyl substituted analogues of trans-2-carboxyazetidine-3-acetic acid (t-CAA) and/or conformationally constrained analogues of (R)- or (S)-glutamic acid (Glu) have been synthesized in a diastereo- and enantiomerically pure form from ss-amino alcohols through a straightforward five step sequence. The key step of this synthesis is an original anionic 4-exo-tet ring closure that forms the azetidine ring upon an intramolecular Michael addition. This reaction was proven to be reversible and to lead to a thermodynamic distribution of two diastereoisomers that were easily separated and converted in two steps into azetidinic amino acids. Azetidines 35-44 were characterized in binding studies on native ionotropic Glu receptors and in functional assays at cloned metabotropic receptors mGluR1, 2 and 4, representing group I, II and III mGlu receptors, respectively. Furthermore, azetidine analogues 35, 36 and 40 were also characterized as potential ligands at the glutamate transporter subtypes EAAT1-3 in the FLIPR Membrane Potential (FMP) assay. The (2R)-azetidines 35, 37, 39, 41 and 43 were inactive in iGlu, mGlu and EAAT assays, whereas a marked change in the pharmacological profile at the iGlu receptors was observed when a methyl group was introduced in the C-4 position, compound 36 versus t-CAA. At EAAT1-3, compound 35 was inactive, whereas azetidines 36 and 40 were both identified as inhibitors and showed selectivity for the EAAT2 subtype. The Royal Society of Chemistry 2005.

Asymmetric synthesis of functionalized azetidines through intramolecular Michael additions

Enantiopure 2-cyano azetidines were prepared in good yields from β-amino alcohols. This synthesis is based on two important steps: (i) Wittig olefination of a transient amino aldehyde derived from a N-cyanomethylated β-amino alcohol and (ii) a 4-exotet ring closure through the intramolecular Michael addition of a lithiated α-amino nitrile. The former step is stereoselective. The thus produced functionalized azetidines were transformed into conformationnally constrained analogues of glutamic acid.

Fluoroamines via chiral cyclic sulfamidates

N-benzyl [1,2,3]-oxathiazolidine 2,2-dioxides (cyclic sulfamidates) were synthesized from their corresponding β-amino alcohols and used as substrates in fluorination reactions with tetrabutylammonium fluoride (TBAF). After desulfonation of the intermediates, the N-benzyl fluoroamines were debenzylated by transfer hydrogenolysis with Pd/C to yield (S) and (R)-2-amino-1-fluoropropanes (2b and 3b, respectively, both with 95% ee). The reactions were carried out on multi-gram scale without the need for chromatographic purification of the intermediates. In the presence of carbonate, the (S)- and (R)-N-benzylfluoroamines underwent intramolecular cyclizations in which fluoride was displaced to yield cyclic carbamates 13 and 14.

Preparation of chiral heterocyclic esters of β-amino acids

Chiral β-amino alcohols were successively prone to N-benzylation, O-allylation and oxidation of the resulting benzylamino group to give nitrones 3 which on hydrolysis afforded chiral hydroxylamines HO-NH-CH(R)-CH2-O-CH2-CH=CH2 ((S)-4: R = Me, Bn, iPr, (R)-4: R = Et). Swern oxidation of methyl 2,2-dimethyl-3-hydroxypropionate (16) and treatment of the resulting aldehyde 17 with hydroxylamines (S)-4b (R = Bn) or (R)-4d (R = Et) provided nitrones 18 that underwent an intramolecular 1,3-dipolar cycloaddition on heating yielding the bicyclic β-amino-acid esters 19b and ent-19d, respectively. Reductive cleavage of the N,O-bond of compounds 19 afforded the eight-membered ring compounds 20b and ent-20d, respectively. N-Benzylalaninol (22) was treated with β-bromo-methacrylate to give the amino alcohol 23. Swern oxidation and subsequent treatment with N-tert-butylhydroxylamine provided the bicyclic ester 26a (R = t-Bu) via the corresponding nitrone 24. Oxime 25 was prepared in an analogous way as 24 with unsubstituted hydroxylamine. It underwent an intramolecular 1.3-dipolar cycloaddition yielding 26b on heating in toluene. Reduction of 26a afforded the pyrrolidine-carboxylic ester 27a.

Regio- and Diastereoselectivity in the Reaction Sequence from Secondary 3-Oxa-5-hexen-1-ylamines to Bicyclic Compounds via Nitrones

Secondary amines 2 and 8 are oxidized by hydrogen peroxide in the presence of sodium tungstate providing nitrones. It the amino function is substituted by one primary and one secondary alkyl moiety, oxidation proceeds with high regioselectivity at the primary alkyl group affording aldonitrones. Thus, compound 2b gives exclusively 3b that undergoes an intramolecular cycloaddition yielding 4b. From 2c, however, in addition to 4c nitrone 5 is formed as by-product, which affords the bridged compound 6 on heating in toluene. Oxidation of compounds 8 yields nitrones 9 which are converted to bridged compounds 10 as major products along with small amounts of regioisomers 11 at elevated temperatures. The intramolecular cycloaddition of the chiral nitrones 3b and c as well as 9b proceeds with high diastereoselectivity.