[PDF] Top 20 Development of the Enantioselective Oxidation of Secondary Alcohols and Natural Products Total Synthesis
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Development of the Enantioselective Oxidation of Secondary Alcohols and Natural Products Total Synthesis
... Cl – ····H–OR bond that forms as the substrate approaches, as in structure 148. Since the forming Cl – anion is not basic enough to deprotonate the bound alcohol alone, assistance in the deprotonation is found with an ... See full document
404
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
TOTAL SYNTHESIS OF BIO ACTIVE NATURAL PRODUCTS AND DEVELOPMENT OF NEW SYNTHETIC METHODOLOGIES
... the synthesis of sulfoxides however, numerous disadvantage associated with those methods like over-oxidation, instability of peroxides and usage of non environmentally benign catalysts for the ...the ... See full document
11
New Strategies for the Total Synthesis of Aza-Propellane Natural Products
... the synthesis of various alkaloid natural products, we sought to develop a unified strategy for the preparation of several hasubanan alkaloids (Figure ...the enantioselective preparation of ... See full document
414
TOTAL SYNTHESIS OF NATURAL PRODUCTS CONTAINING δ-LACTONE MOIETY
... and enantioselective reduction of the keto group with catecholborane furnished 1,3-syn diol ...of secondary hydroxy group in 96 was carried out efficiently with acryloyl chloride in the presence of Et 3 N ... See full document
18
Development of a Novel Ring Contraction Strategy and Application to the Total Synthesis of Presilphiperfolanol Natural Products
... the development of a catalytic asymmetric synthesis of five and seven-membered rings containing all-carbon quaternary ...stereocenters. Enantioselective Pd-catalyzed decarboxylative allylic ... See full document
1188
Exploiting the Reactivity of Arynes in the Total Synthesis of Natural Products
... racemic synthesis of curvularin by this route, Gerlach rendered the route enantioselective by beginning his synthesis with (–)-(S)-#-valerolactone ...racemic synthesis of curvularin. ... See full document
572
TOTAL SYNTHESIS OF BIO-ACTIVE NATURAL PRODUCTS AND DEVELOPMENT OF NEW SYNTHETIC METHODOLOGIES
... Simplactones are pharmacologically active marine secondary metabolites isolated from the Caribbean sponge Plakortis simplex. Simplactones are having in vitro cytotoxic activity against WEHI 164, murine ... See full document
14
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 .
... for Total Synthesis” ...“Pyrrolidinyl-Spirooxindole Natural Products as Inspirations for the Development of Potential Therapeutic Agents” ... See full document
364
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
... catalytic enantioselective unified strategy for towards the synthesis of the oxylipin class of natural ...lead synthesis of C(5) epimeric alcohols which in turn would facilitate the ... See full document
22
Enantioselective Total Synthesis of Diketopiperazinecontaining Natural Products: (–)-Lansai B, (+)-Nocardioazines A and B, and (–)-Acetylapoaranotin
... the development of new, catalytic asymmetric cyloaddition reactions of ...for enantioselective dearomatization reactions will be an important area of research, particularly as we seek to develop ... See full document
351
Development of a Synthetic Strategy Toward Trans Cyclobutane Containing Natural Products: Enantioselective Total Synthesis of (+) Psiguadial B
... I could not have asked for a better project partner and confidant than Jordan Beck, who is an exceptionally talented chemist and an all-around joy to spend time with. It has been an honor to mentor him as a first year ... See full document
385
Structural Activity of Unsaturated Alcohols and Oxidation Towards Pyrazinium Chlorochromate
... Pyrazinium chlorochromate (PzCC) was added in excess to carry out stoichiometric study. The alcohols and PzCC were mixed in the ratio 1: 2 and were kept over night at 298 K in perchloric acid, acetic acid and ... See full document
6
Kinetics and mechanism of the selective oxidation of benzyl alcohols by acidified dichromate in aqueous acetic acid medium
... possible and supports the interaction between an ion and a dipole. The influence of substituents at the para position of the benzene ring of benzyl alcohol was studied and found that electron-releasing susbtituents ... See full document
6
Simple and Practical Aerobic Oxidation of Alcohols Catalyzed by a (μ Oxo)tetraruthenium Cluster
... catalytic oxidation of alcohols to aldehydes and ketones can be used with a wide range of alcohols, is highly atom-efficient, and is particularly con- venient with respect to a simple operation under ... See full document
6
La2O3 Catalyzed Oxidation of Alcohols
... The oxidation of alcohols has been of contemporary in- terest due to diversified potentials in organic chemistry and industrial manufacturing, and is recognized a fun- damental reaction ...The ... See full document
6
Synthesis of Precursor Imidazolium Salts for the Synthesis of N-Heterocyclic Carbines Used as Ligands for the Enantioselective Preparation of Heterosteroids Compounds
... feature of NHC is not only its strong -donating capability to metals but also the possibility of varying the susbstituents on the nitrogen atom. It is possible that introduction of chiral substituents into NHC would ... See full document
8
Lipases catalyzed enantioselective kinetic resolution of alcohols
... chiral alcohols catalyzed by lipases including PCL (Pseudomonas cepacia lipase), and proposed an empirical law of ...a secondary alcohol with the alcohol group pointing backwards, the enantiomer with the ... See full document
12
Chitosan supported biosynthesized gold nanoparticles as catalyst for oxidation and reduction reactions
... composition, oxidation state, and chemical/physical environment can play a significant role in setting the NPs ...the synthesis of supported AuNPs catalyst and its application in oxidation reactions ... See full document
51
Development of Enantioselective Organocatalytic Hydrogenation Methods and Progress toward the Total Synthesis of (+)-Minfiensine
... The proposed catalytic cycle begins with condensation of imidazolidinone catalyst salt 2 onto α , β -unsaturated aldehyde 7 to provide iminium intermediate 8 (Fig. 4). Conjugate reduction by dihydropyridine 9 forms both ... See full document
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