Heteroaromatic diphosphines as chiral ligands

Chiral diphosphine comprising an aromatic pentatomic biheterocyclic system according to the following general formula:

• where X is C or N;
• W is C or N;
• and with the proviso that only one of X or W is N;
• and provided that the biheterocyclic rings are symmetrically heterosubstituted by at least one nitrogen atom;
• where:
• R2 is selected from the group consisting of hydrogen, phenyl, aryl, linear, branched, and cyclic alkyl C1-C10, COOR3, where R3 is linear, branched, and cyclic alkyl C1-C10;
• Y is selected from the group consisting of phenyl, substituted phenyl where substituents are selected from the group consisting of linear, branched, and cyclic alkyl, C1-C10, halogen, OR6 where R6 is linear, branched, and cyclic alkyl C1-C10, aryl, substituted aryl where substituents are selected from the group consisting of linear, branched, and cyclic alkyl C1-C10, halogen, OR6 where R6 is linear, branched, and cyclic alkyl C1-C10, linear, branched, and cyclic alkyl C3-C10;
• R1 is selected from the group consisting of phenyl, substituted phenyl where substituents are selected from the group consisting of linear, branched, and cyclic alkyl C1-C10, halogen, OR6 where R6 is linear, branched, and cyclic alkyl C1-C10, aryl, substituted aryl where substituents are selected from the group consisting of linear, branched, and cyclic alkyl C1-C10, halogen, OR6 where R6 is linear, branched, and cyclic alkyl C1-C10, linear, branched, and cyclic alkyl C1-C10, OR5, where R5 is linear, branched, and cyclic alkyl C1-C10, and each pentatomic heterocyclic aromatic ring of said system is optionally fused to an optionally substituted benzene or napthalene ring, wherein the optional substituents are selected from among the group consisting of linear, branched, and cyclic alkyl C1-C10, halogen, OR6 where R6 is linear, branched, and cyclic alkyl C1-C10, and unsubstituted according to the following formula:
• where X is N;
• and
• where R4 is selected from the group consisting of hydrogen, linear, branched, cyclic, and unsubstituted alkyl C1-C10, n ranges from 0 to 6;
• where R2 is selected from the group consisting of hydrogen, phenyl, aryl, linear, branched, and cyclic alkyl C1-C10, COOR3, where R3 is linear, branched and cyclic alkyl C1-C10.