Chiral spiro phosphorus-nirogen-sulphur tridentate ligand, preparation method and application thereof

A chiral spiro phosphine-nitrogen-sulfur tridentate ligand having the structure of Formula I or Formula II, their racemates, optical isomers or their catalytically acceptable salt thereof,

• wherein, R1 is selected from C1-C10 alkyl, phenyl, substituted phenyl, 1-naphthyl, 2-naphthyl, heteroaryl or benzyl, and the substituent on said phenyl is C1-C10 alkyl or alkoxyl, with a substituent amount ranging from 1˜5, and said heteroaryl is furyl, thienyl or pyridyl;
• R2, R3, R4 and R5 are independently selected from H, C1-C10 alkyl, phenyl, substituted phenyl, 1-naphthyl, 2-naphthyl, heteroaryl or benzyl, and the substituent on said phenyl is C1-C10 alkyl or alkoxyl, with a substituent amount of 1˜5, and said heteroaryl is furyl, thienyl or pyridyl;
• C1-C10 alkoxyl;
• or R2˜R3, R4˜R5 are incorporated into C3-C7 aliphatic ring, aromatic ring;
• R2, R3, R4 and R5 can be the same or different;
• R6, R7 are independently selected from H, C1-C10 alkyl, C1-C10 alkoxy, C1-C10 alphatic amido group, and n=0˜3;
• or when n≥2, two adjacent R6 groups or two adjacent R7 groups can be incorporated into a C3-C7 aliphatic ring or aromatic ring and R6, R7 can be same or different;
• R8, R9 are independently selected from C1-C10 alkyl, C1-C10 alkoxy, phenyl, substituted phenyl, 1-naphthyl, 2-naphthyl, heteroaryl or benzyl, and the substituent on said phenyl is C1-C10 alkyl or alkoxyl, with a substituent amount of 1˜5, and said heteroaryl is furyl, thienyl or pyridyl;
• or R8 and R9 groups can be incorporated into a ring by C2-C4 carbon chain, carbon chain containing N, O, S, aromatic nucleus or heterocyclic aromatic ring;
• R8, R9 can be the same or different.