Rhodium-Catalyzed Regio- and Enantioselective Allylic Amination of Racemic 1,2-Disubstituted Allylic Phosphates
作者:Wen-Bin Xu、Minghe Sun、Mouhai Shu、Changkun Li
DOI:10.1021/jacs.1c04016
日期:2021.6.9
Alkynylphosphines are rarely used as ligands in asymmetric metal catalysis. We synthesized a series of chiral bis(oxazoline)alkynylphosphine ligands and used them in Rh-catalyzed highlyregio- and enantioselectiveallylicamination reactions of 1,2-disubstituted allylic phosphates. Chiral 1,2-disubstituted allylic amines were synthesized in up to 95% yield with >20:1 branched/linear (b/l) ratio and
An aldehyde of formula (I)
in the form of any one of its stereoisomers or a mixture thereof, wherein each dotted line, independently from each other, represents a single or double bond; n is 0 or 1; R
1
is a hydrogen atom or a methyl group; R
2
is a hydrogen atom or a methyl or ethyl group; and R
3
, which can be present in any of positions 2 to 6 of the cyclic moiety, is a hydrogen atom or a methyl or ethyl group, or a CH
2
group bridging positions 3 and 6. Also, the use of the aldehyde as perfuming ingredient to impart odor notes of the aldehyde, lily of the valley type.
An aldehyde of formula (I)
in the form of any one of its stereoisomers or a mixture thereof, wherein each dotted line, independently from each other, represents a single or double bond; n is 0 or 1; R1 is a hydrogen atom or a methyl group; R2 is a hydrogen atom or a methyl or ethyl group; and R3, which can be present in any of positions 2 to 6 of the cyclic moiety, is a hydrogen atom or a methyl or ethyl group, or a CH2 group bridging positions 3 and 6. Also, the use of the aldehyde as perfuming ingredient to impart odor notes of the aldehyde, lily of the valley type.