[PDF] Top 20 Lipases catalyzed enantioselective kinetic resolution of alcohols
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Lipases catalyzed enantioselective kinetic resolution of alcohols
... Dynamic kinetic resolution (DKR) provides a powerful methodology for the complete transformations of racemates to single ...the enantioselective additions of aryl nucleophiles to aromatic aldehydes ... See full document
12
Enantioselective synthesis of allylboronates and allylic alcohols by copper catalyzed 1,6 boration
... [] We thank the ERC (Starting Grant No. 258580), the EPSRC (Leadership Fellowship to H.W.L.), Pfizer, AstraZeneca, and the University of Edinburgh for support. We thank Xiaoming Yang of Shanghai Chiral Chemistry Co., ... See full document
5
Chemoenzymatic Kinetic resolution of (R)-malathion in aqueous media
... available lipases as biocata- lysts for the enantioselective hydrolysis of (R,S)-mala- thion was ...the lipases studied, showing conversion yields up to ...the resolution of other OP ’ s such ... See full document
9
Development of the Enantioselective Oxidation of Secondary Alcohols and Natural Products Total Synthesis
... oxidative kinetic resolution of secondary alcohols by catalytic palladium was developed in our ...this enantioselective oxidation reaction are the use of the diamine (–)-sparteine as the ... See full document
404
A C=O•••isothiouronium interaction dictates enantiodiscrimination in acylative kinetic resolution of tertiary heterocyclic alcohols
... the carbonyl oxygen is replaced with sulfur, were both resolved with excellent selectivity (s = 41 and 39 respectively). The effect of removing the carbonyl completely was simulated using indenol derivative 29. No ... See full document
7
Acylative kinetic resolution of alcohols using a recyclable polymer supported isothiourea catalyst in batch and flow
... secondary alcohols was demon- strated using 6 as catalyst (1 mol%), with the substrate scope including benzylic, allylic and propargylic alcohols, cycloal- kanol derivatives and a 1,2-diol (28 ...the ... See full document
10
Optimization and kinetic modeling of lipase mediated enantioselective kinetic resolution of (±) 2 octanol
... The analysis of the kinetic data showed that the acylation of ±-2-octanol with vinyl acetate catalyzed by Novozyme 435 follows the ternary complex mechanism ordered bi-bi mechanism with [r] ... See full document
9
Development and Applications of the Palladium Catalyzed Enantioselective Oxidation of Secondary Alcohols
... palladium-catalyzed enantioselective oxidation of secondary alcohols has been developed, utilizing the readily available diamine (–)-sparteine as chiral ligand and molecular oxygen as the sole ... See full document
505
Applications of enzymes to the preparation of optically active compounds
... the resolution o f chiral secondary ...ate. Lipases have been used in the work on chiral alcohols b ec au se they are most su ited to this ow ing to the nature of their n atu ral ...the ... See full document
272
Isothiourea catalysed acylative kinetic resolution of aryl alkenyl (sp2 vs sp2) substituted secondary alcohols
... naphthyl alcohols, the KR protocol was tested on aryl substrates ( )-35 and ( )-36 containing 4-phenyl and 3- vinyl substituents, respectively (Table 3, entries 8 and ... See full document
8
Part A: Palladium(II)-Catalyzed Enantioselective Saucy-Marbet Claisen Rearrangement of Propargyloxy indoles to Quaternary Oxindoles and Spirocyclic Lactones. Part B: The Regioselective Oxidative Coupling of Phenols .
... and Enantioselective Conjugate Addition of 3-Substituted Oxindoles to Nitroolefins Catalyzed by a Chiral Ni(OAc)2-Diamine Complex under Mild Conditions” ...Phosphoramide Catalyzed Highly ... See full document
364
1,3 Transposition of Allylic Alcohols Catalyzed by Methyltrioxorhenium
... no kinetic scheme, plausible or otherwise, to account for this set of ...the kinetic data, which was satisfac- tory among experiments carried out any 1 ...1. Kinetic trace obtained by NMR ... See full document
8
Enantioselective Organocatalyzed -Amination of 1,3-Dicarbonyl Compounds in Deep Eutectic Mixtures
... On the other hand, significant advances have been achieved in the metal-catalyzed or organocatalytic asymmetric electrophilic -amination of carbonyl compounds with during the past years [15-19]. In fact, chiral ... See full document
11
Ether tethered Ru(ii)/TsDPEN complexes : synthesis and applications to asymmetric transfer hydrogenation
... The enantioselective reduction of ketones to alcohols is a pivotal reaction in organic chemistry, for which a large number of catalysts have been reported.1 Of these, a particularly succ[r] ... See full document
10
Development of Stereoselective Iridium-Catalyzed Allylic Alkylation Methods
... In summary, we have developed the first enantioselective iridium-catalyzed allylic alkylation reaction of masked acyl cyanide (MAC) reagents. The umpolung strategy showcased in this reaction diverges from ... See full document
839
Binol Based Chirality Conversion Reagents for Underivatized Amino Acids
... dur- ing the imine formation along with internal Resonance-Assisted H-bonds (RAHBs) play important roles in de- termining the stereoselective ratio (D/L) during the Chirality Conversion (CC). Recently, we reported pyr- ... See full document
8
Enantioselective Benzylation and Allylation of α Trifluoromethoxy Indanones under Phase-Transfer Catalysis
... organo-catalyzed enantioselective benzylation reaction of α-trifluoromethoxy indanones afforded α-benzyl-α-trifluoromethoxy indanones with a tetrasubstituted stereogenic carbon center in excellent yield ... See full document
14
Enantioselective rhodium-catalyzed coupling of arylboronic acids, 1,3-enynes, and imines by alkenyl-to-allyl 1,4-rhodium(I) migration
... Enantioselective Rhodium-Catalyzed Coupling of Arylboronic Acids, 1,3-Enynes, and Imines by Alkenyl-to-Allyl 1,4-Rhodium(I) Migration. Angew. Chem. Int. Ed., which has been published in final form at ... See full document
8
ENANTIOSELECTIVE TOTAL SYNTHESIS OF DIOSPONGINS, TOWARDS THE ENANTIOSELECTIVE TOTAL SYNTHESIS OF SOLANDELACTONES AND AN EXPEDIENT SYNTHESIS OF EANTIOENRICHED SUBSTITUTED (BENZOFURAN-YL)- ARYL AND HETEROARYL CARBINOLS
... Having prepared the two enantiomeric tetrahydropyryl alcohols 10, ent-10 we next proceeded to synthesise diospongin B 1 and its enatiomer ent-1. Proceeding further, the hydroxy group of 10 was converted to PMB ... See full document
22
Development of the Lewis acid catalyzed Allenoate Claisen rearrangement Investigations of enantioselective catalysis of the Allenoate Claisen rearrangement Studies towards the total synthesis of erythrolide E
... The development of a new Lewis acid catalyzed sigmatropic reaction is described. This process, termed the allenoate-Claisen rearrangement, involves the metal-catalyzed condensation of an allenic ester with ... See full document
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