174770-74-2Relevant articles and documents
Bioproduction of Enantiopure (R)- and (S)-2-Phenylglycinols from Styrenes and Renewable Feedstocks
Sekar, Balaji Sundara,Mao, Jiwei,Lukito, Benedict Ryan,Wang, Zilong,Li, Zhi
, p. 1892 - 1903 (2020/12/22)
Enantiopure (R)- and (S)-2-phenylglycinols are important chiral building blocks for pharmaceutical manufacturing. Several chemical and enzymatic methods for their synthesis were reported, either involving multi-step synthesis or starting from a relatively complex chemical. Here, we developed one-pot simple syntheses of enantiopure (R)- and (S)-2-phenylglycinols from cheap starting materials and renewable feedstocks. Enzyme cascades consisting of epoxidation-hydrolysis-oxidation-transamination were developed to convert styrene 2 a to (R)- and (S)-2-phenylglycinol 1 a, with butanediol dehydrogenase for alcohol oxidation as well as BmTA and NfTA for (R)- and (S)-enantioselective transamination, respectively. The engineered E. coli strains expressing the cascades produced 1015 mg/L (R)-1 a in >99% ee and 315 mg/L (S)-1 a in 91% ee, respectively, from styrene 2 a. The same cascade also converted substituted styrenes 2 b–k and indene 2 l into substituted (R)-phenylglycinols 1 b–k and (1R, 2R)-1-amino-2-indanol 1 l in 95–>99% ee. To transform bio-based L-phenylalanine 6 to (R)-1 a and (S)-1 a, (R)- and (S)-enantioselective enzyme cascades for deamination-decarboxylation-epoxidation-hydrolysis-oxidation-transamination were developed. The engineered E. coli strains produced (R)-1 a and (S)-1 a in high ee at 576 mg/L and 356 mg/L, respectively, from L-phenylalanine 6, as the first synthesis of these compounds from a bio-based chemical. Finally, L-phenylalanine biosynthesis pathway was combined with (R)- or (S)-enantioselective cascade in one strain or coupled strains, to achieve the first synthesis of (R)-1 a and (S)-1 a from a renewable feedstock. The coupled strain approach enhanced the production, affording 274 and 384 mg/L (R)-1 a and 274 and 301 mg/L (S)-1 a, from glucose and glycerol, respectively. The developed methods could be potentially useful to produce these high-value chemicals from cheap starting materials and renewable feedstocks in a green and sustainable manner. (Figure presented.).
Synthesis of enantiopure 1,2-azido and 1,2-amino alcohols via regio- and stereoselective ring-opening of enantiopure epoxides by sodium azide in hot water
Wang, Hai-Yang,Huang, Kun,De Jesús, Melvin,Espinosa, Sandraliz,Pi?ero-Santiago, Luis E.,Barnes, Charles L.,Ortiz-Marciales, Margarita
, p. 91 - 100 (2016/02/09)
A practical and convenient method for the efficient and regio- and stereoselective ring-opening of enantiopure monosubstituted epoxides by sodium azide under hydrolytic conditions is reported. The ring-opening of enantiopure styryl and pyridyl (S)-epoxides by N3- in hot water takes place preferentially at the internal position with complete inversion of configuration to produce (R)-2-azido ethanols with up to 99% enantio- and regioselectivity, while the (S)-adamantyl oxirane provides mainly the (S)-1-adamantyl-2-azido ethanol in excellent yield. In general, 1,2-amino ethanols were obtained in high yield and excellent enantiopurity by the reduction of the chiral 1,2-azido ethanols with PPh3 in water/THF, and then converted into the Boc or acetamide derivatives.
SONIC HEDGEHOG MODULATORS
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Paragraph 1072, (2014/04/17)
Sonic Hedgehog modulators and methods of use thereof are provided for.
Electronic effects of aryl-substituted bis(oxazoline) ligands on the outcome of asymmetric copper-catalysed C-H insertion and aromatic addition reactions
Slattery, Catherine N.,O'Keeffe, Sarah,Maguire, Anita R.
, p. 1265 - 1275 (2013/11/19)
The effect of the modification of bis(oxazoline) ligands on the outcome of copper-catalysed C-H insertion and aromatic addition reactions is described. In general, these reactions display minimum sensitivity in terms of enantiocontrol to variation of the electronic properties of the aryl moiety of the ligand however, some influence is observed for C-H insertions employing naphthyl-substituted bis(oxazolines) and for aromatic addition reactions of biphenyl diazo ketone substrates. The synthesis of the modified bis(oxazolines), which include four novel structures, is also described.
Thiazolinone unsubstituted quinolines
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Page/Page column 16, (2010/02/15)
Thiazolinone quinoline derivatives having no substitution on the quinoline ring active as CDK1 inhibitors which are useful as anti-proliferation agents such as for treating solid tumors.
PYRAZOLE DERIVATIVES AS INHIBITORS OF RECEPTOR TYROSYNE KINASES
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Page/Page column 114, (2008/06/13)
Compounds of formula (I): and their use in the inhibition of Trk activity are described.
Pyrrolidinyl hydroxamic acid compounds and their production process
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, (2008/06/13)
A compound of formula (I) STR1 and its pharmaceutically acceptable salt, wherein A is hydrogen or OY, wherein Y is a hydroxy protecting group; Ar is phenyl optionally substituted with one or more substituents selected from halo, hydroxy, C1 -C4 alkyl, C1 -C4 alkoxy, CF3, C1 -C4 alkoxy-C1 -C4 alkyloxy and carboxy-C1 -C4 alkyloxy; X is phenyl, naphthyl, biphenyl, indanyl, benzofuranyl, benzothiophenyl, 1-tetralone-6-yl,C1 -C4 alkylenedioxy, pyridyl, furyl and thienyl these groups optionally being substituted with up to three substituents selected from halo, C1 -C4 alkyl, C1 -C4 alkoxy, hydroxy, NO2, CF3 and SO2 CH3 ; and R is hydrogen, C1 -C4 alkyl or a hydroxy protecting group. These compounds and pharmaceutical compositions containing them are useful as analgesic, anti-inflammatory, diuretic, anesthetic or neuroprotective agents, or an agent for stroke or treatment of functional bowel diseases such as abdominal pain, for the treatment of a mammalian subject, especially a human subject. Further, the present invention provides processes for producing the hydroxamic compounds of formula (I) and their intermediate compounds of the formula. STR2
Azetidine, pyrrolidine and piperidine derivatives
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, (2008/06/13)
A class of substituted azetidine, pyrrolidine and piperidine derivatives, linked by a fluoro-substituted alkylene chain to a fused bicyclic heteroaromatic moiety such as indolyl, are selective agonists of 5-HT1 -like receptors, being potent ago
3-[3-(piperidin-1-yl)propyl]indoles as highly selective h5-HT(1D) receptor agonists
Russell, Michael G. N.,Matassa, Victor G.,Pengilley, Roy R.,Van Niel, Monique B.,Sohal, Bindi,Watt, Alan P.,Hitzel, Laure,Beer, Margaret S.,Stanton, Josephine A.,Broughton, Howard B.,Castro, José L.
, p. 4981 - 5001 (2007/10/03)
Several 5-HT(ID/1B) receptor agonists are now entering the marketplace as treatments for migraine. This paper describes the development of selective h5-HT(1D)receptor agonists as potential antimigraine agents which may produce fewer side effects. A series of 3-[3-(piperidin-1-yl)propyl]indoles has been synthesized which has led to the identification of 80 (L-772,405), a high- affinity h5-HT(1D) receptor full agonist having 170-fold selectivity for h5- HT(1D) receptors over h5-HT(1B) receptors. L-772,405 also shows very good selectivity over a range of other serotonin and nonserotonin receptors and has excellent bioavailability following subcutaneous administration in rats. It therefore constitutes a valuable tool to delineate the role of h5-HT(1D) receptors in migraine. Molecular modeling and physical properties have been utilized to postulate the binding conformation of these compounds in the receptor cavity.
Azetidine, pyrrolidine and piperidine derivatives
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, (2008/06/13)
A class of substituted azetidine, pyrrolidine and piperidine derivatives are selective agonists of 5-HT1 -like receptors, being potent agonists of the human 5-HT1Dα receptor subtype whilst possessing at least a 10-fold selective affinity for the 5-HT1Dα receptor subtype relative to the 5-HT1Dβ subtype; they are therefore useful in the treatment and/or prevention of clinical conditions, in particular migraine and associated disorders, for which a subtype-selective agonist of 5-HT1D receptors is indicated, whilst eliciting fewer side-effects, notably adverse cardiovascular events, than those associated with non-subtype-selective 5-HT1D receptor agonists.
