Internal olefins to linear amines

Synthesis of Biologically Active Amines via Rhodium−Bisphosphite-Catalyzed Hydroaminomethylation

[reaction: see text] We report the use of a highly regioselective rhodium-bisphosphite catalyst for olefin hydroaminomethylation. This catalyst system was successfully applied in the synthesis of two biologically active tertiary amines, ibutilide and aripiprazole.

A Novel MCR of Isocyanates, Aldehydes, and Dienophiles

[reaction: see text] A novel one-pot procedure for the three-component coupling reaction of isocyanates, aldehydes, and dienophiles (IAD reaction) has been developed. Condensation of isocyanates and aldehydes and subsequent Diels-Alder reactions with electron-deficient dienophiles furnishes endo-selective amino-substituted cyclohexenes in good yield.

Synthesis of linear aldehydes from internal olefins in water

We show here, for the first time, that the carbonylation of internal olefins in a biphasic water system is possible. It is shown that control of the pH and CO partial pressure are important factors for successful reactions. Interestingly, the water-soluble catalyst leads to significantly higher regioselectivity compared to similar catalysts soluble in organic solvents. The obtained n/i-selectivities exceed all known literature data and the catalyst can be easily reused several times.

Amines made easily: a highly selective hydroaminomethylation of olefins

A highly chemo- and regioselective hydroaminomethylation of simple as well as functionalized alpha-olefins using a cationic rhodium precatalyst together with Xantphos as ligand is reported. Studies of the influence of ligands and reaction conditions led to an unprecedented selective hydroaminomethylation procedure. The novel procedure constitutes an economically attractive and environmentally favorable synthesis of secondary and tertiary aliphatic amines.