Abstract
The chiral (S)-3-alkyl-3-(pyrrol-1-yl)prop-1-enes 1a-c were hydroformylated at 20°C and high pressure (100 atm) giving the branched aldehydes 2-methyl-3-(pyrrol-1-yl)alkanales (2+2) with a good regio-selectivity and a high diastereomeric excess (2/2 up to 90:10). The absolute configuration of the diastereomers was assigned via NMR measurements, 2S,3S being the predominant one.
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