Allylic alkylation

NHC–Pd(II) complexes bearing a chiral oxazoline ligand (IIIa–f) were synthesized by cleavage of dimeric palladium complexes with the oxazoline ligand. They were fully characterized by 1 H and 13 C NMR and elemental analyses. The catalytic activity of the complexes (IIIa–f) in allylic alkylation reactions was evaluated. The complex IIIa was found to be the most active catalyst. Very low ee values indicate that the oxazoline is dissociated from the active catalytic species.

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Đề tài tổng hợp dẫn xuất quang hoạt của cis-(+)-N-allylhexahydrophthalazinon nhằm khảo sát khả năng tách đồng phân quang học của tác nhân bất đối (S)-()-α-methylbenzylamin, khả năng alkyl hóa của allyl bromid trên khung hexahydrophthalazinon, đồng thời khảo sát hoạt tính kháng viêm của sản phẩm tổng hợp được.

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[n.3.0]Bicycles (n = 3–6) can be synthesized using palladium-catalyzed asymmetric allylic alkylation followed by rutheniumcatalyzed cycloisomerization. New types of triarylphosphino-1,2-diaminooxazoline ligands show the same high levels of enantioselectivity observed with Trost ligand when employed in Pd-catalyzed allylic alkylation reactions. The enyne products of these allylic alkylation reactions were further elaborated using a Ru-catalyzed redox isomerization process, for which a mechanism is proposed.

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The Urea-Hydrogen Peroxide complex (UHP) was synthesized from urea and hydrogen peroxide, characterized by FT-IR. This UHP complex could be employed as an oxidizing agent for metal-free oxidation reaction of disulfides to thiosulfinate compounds. This protocol was carried out under very mild conditions at 0oC in CH3CO2H solvent, was efficient and compatible with a range of alkyl, aryl or allyl disulfides to afford direct access to thiosulfinate compounds in very good yields up to 92% and high selectivities.

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(bq) part 1 book "organic chemistry" has contents: chemical bonding, alkanes, conformations of alkanes and cycloalkanes, alcohols and alkyl halides, structure and preparation of alkenes - elimination reactions, stereochemistry, nucleophilic substitution,... and other contents.

609p bautroibinhyen20 06-03-2017 58 7   Download

(bq) part 1 book "organic chemistry" has contents: structure determines properties, alcohols and alkyl halides, addition reactions of alkenes, stereochemistry, nucleophlic substitution, conlugation in alkadienes and allylic systems, arenes and aromaticity, spectroscopy,... and other contents.

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(bq) the book brief explanations describing the purpose of each problem and the rationale behind the solutions, helpful notes in the margin highlighting important principles and directing students to further information in the chemical literature.

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This chapter aims to cover theoretical and computational studies on or- ganometallic molecules. Section 2 covers the s-block elements, Section 3 covers the p-block metals and Section 4 covers the d- and f-block metals. Clusters, carbonyls and metal-metal bonded systems containing M-C bonds are included. Cyanide complexes, metal fullerene derivatives, extended systems and organic species on metal surfaces are excluded except where calculations have been performed on model complexes designed to mimic solid state and surface chem- istry....

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