Aldehyde-enamines from α-oxocarboxylic acids. A facile and general route to aldehydes via decarboxylation of α-oxocarboxylic acids carrying β-hydrogens
Aldehyde-enamines from α-oxocarboxylic acids. A facile and general route to aldehydes via decarboxylation of α-oxocarboxylic acids carrying β-hydrogens
Both 2:1 and 1:1 couplings of alkylacetylenes with secondary amines were achieved using 8-quinolinolato rhodium catalysts and CsF. The 2:1/1:1 selectivity was switched by choosing the reaction solvent. In DMA, an unprecedented 2:1 coupling reaction of alkylacetylenes with amines proceeded to give 2-aminodiene products. One-pot 2:1 coupling/reduction provided rapid access to various allylamines, while
A Versatile Approach to 2-Substituted 3-Trifluoromethyl-1,3-diols Based on the Reaction of Trifluoroacetaldehyde Ethyl Hemiacetal with Enamines Derived from Aldehydes
Treatment of trifluoroacetaldehyde ethyl hemiacetal with various enamines, derived from various aldehydes, at room temperature, followed by hydrolysis with 10% HCl aqueous solution and reduction with sodium borohydride in ethanol, gave 2-substituted 3-trifluoromethyl-1,3-diols in good yields with fair to good diastereoselectivities.
Aldehyde-enamines from α-oxocarboxylic acids. A facile and general route to aldehydes via decarboxylation of α-oxocarboxylic acids carrying β-hydrogens