Selective hydroboration of alkenes and alkynes in the presence of aldehydes and ketones

Article Abstract:

Reactions of terminal alkenes with various borane reagents when aldehydes or ketones are present have been studied. Selective hydroboration of a terminal alkene when a ketone or aldehyde is present is highest in efficiency when dicyclohexylborane is the hydroboration agent. Hydroboration of alkynyl aldehydes and alkynyl ketones with dicyclohexylborane gives corresponding olefinic carbonyl compound products following protonation or dicarbonyl compounds following oxidation.

Oxidation-reduction reaction, Oxidation-reduction reactions, Aldehydes, Ketones, Hydroboration

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The reactivity of the high-energy intermediates formed in the reactions of Group 13 metal atoms and aromatic alkenes

Article Abstract:

Organoaluminum intermediates can be formed by the reaction of aromatic alkenes and Group 13 metal atoms in a rotating cryostat reactor. 2-phenylaluminacyclopropane, cis- and trans-3,4-diphenylaluminacyclopentane, and cis- and trans-2,4-diphenylaluminacyclopentane are produced in a reaction of aluminum atoms with styrene. Reactions of aluminum and alpha-methylstyrene produce 2-methyl-2-phenylaluminacyclopropane and 3,4-dimethyl-3,4-diphenylaluminacyclopentane.

Usage, Organic compounds, Aluminum compounds, Organic compound synthesis, Organometallic compounds, Styrene

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On the possibility of conversion of strained bridgehead alkenes into carbenes via 1,2 hydrogen and 1,2 carbon migrations: a theoretical study of the rearrangements in the adamantene and protoadamantene systems

Article Abstract:

The possibility of conversion of strained bridgehead alkenes to carbenes has been studied. The mechanism would procede via 1,2-carbon and 1,2-hydrogen migration. A theoretical study has been made of rearrangements in the protoadamantene and adamantene systems. High-level ab initio computations were used.

Research, Oligosaccharides, Chemistry, Physical and theoretical, Physical chemistry, Rearrangements (Chemistry), Diels-Alder reaction

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