Optically active biaryl phosphorus compound and production process thereof

1. A phosphorus compound defined by the following general formula (1):

in the formula (1), R 1 denotes a hydrogen atom or a hydroxy protective group; R 2 denotes a group defined by the following formula (R 2 -1) or (R 2 -2); R 3 , R 4 , R 5 , and R 6 may be the same or different and independently denote a hydrogen atom, an alkyl group, an alkoxy group, an acyloxy group, a halogen atom, a haloalkyl group, or a dialkylamino group; two among R 3 , R 4 , R 5 , and R 6 may form an aromatic ring optionally having a substituent group, and two among R 3 , R 4 , R 5 , and R 6 may form a methylene chain optionally having a substituent group or a (poly)methylenedioxy group optionally having a substituent group:

in the formula (R 2 -1) and (R 2 -2), R 7 denotes an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, or an aryloxy group; R 8 and R 9 independently denote a hydrogen atom, an alkyl group, or an aryl group; z denotes a divalent group selected from an oxygen atom, a sulfur atom, NR N and Si(R Si ) 2 , R N denoting an alkyl, an aryl, an alkanesulfonyl, an arylsulfonyl, or an acyl group and R Si denoting an alkyl or an aryl group or Si(R Si ) 2 may form a ring; and (a) denotes an integer of 0 or 1.

2. The phosphorus compound according to claim 1 , which is an axially asymmetric optically active substance.

3. The phosphorus compound according to claim 1 , which is defined by the following general formula (3):

in the formula (3), R 1 denotes a hydrogen atom or a hydroxy protective group; R 2 denotes a group defined by the following formula (R 2 -1) or (R 2 -2):

in the formula (R 2 -1) and (R 2 -2), R 7 denotes an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, or an aryloxy group; R 8 and R 9 independently denote a hydrogen atom, an alkyl group, or an aryl group; z denotes a divalent group selected from an oxygen atom, a sulfur atom, NR N and Si (R Si ) 2 , R N denoting an alkyl, an aryl, an alkanesulfonyl, an arylsulfonyl, or an acyl group and R Si denoting an alkyl or an aryl group or Si(R Si ) 2 may form a ring; and (a) denotes an integer of 0 or 1.

4. The phosphorus compound according to claim 3 , which is an axially asymmetric optically active substance.

5. A process for producing the phosphorus compound as claimed in claim 2 , which comprises reacting a diyne compound defined by the following general formula (2-1) with an alkynyl phosphorus compound defined by the following general formula (3-1) by the use of a catalyst containing rhodium metal and an optically active bisphosphine:

in the formula (2-1), R 8 and R 9 independently denote a hydrogen atom, an alkyl group, or an aryl group; z denotes a divalent group selected from an oxygen atom, a sulfur atom, NR N and Si(R Si ) 2 , R N denoting an alkyl, an aryl, an alkanesulfonyl, an arylsulfonyl, or an acyl group and R Si denoting an alkyl or an aryl group or Si(R Si ) 2 may form a ring; and in the formula (3-1), R 1 denotes a hydrogen atom or a hydroxy protective group; R 3 , R 4 , R 5 , and R 6 may be the same or different and independently denote a hydrogen atom, an alkyl group, an alkoxy group, an acyloxy group, a halogen atom, a haloalkyl group, or a dialkylamino group; two among R 3 , R 4 , R 5 , and R 6 may form an aromatic ring optionally having a substituent group, and two among R 3 , R 4 , R 5 , and R 6 may form a methylene chain optionally having a substituent group or a (poly)methylenedioxy group optionally having a substituent group; R 7 denotes an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, or an aryloxy group; and a denotes an integer of 0 or 1.

6. A process for producing the phosphorus compound as claimed in claim 2 , which comprises reacting a diyne compound defined by the following general formula (2-2) with an alkynyl phosphorus compound defined by the following general formula (3-2) by the use of a catalyst containing rhodium metal and an optically active bisphosphine:

in the formula (2-2), R 1 denotes a hydrogen atom or a hydroxy protective group; R 3 , R 4 , R 5 , and R 6 may be the same or different and independently denote a hydrogen atom, an alkyl group, an alkoxy group, an acyloxy group, a halogen atom, a haloalkyl group, or a dialkylamino group; two among R 3 , R 4 , R 5 , and R 6 may form an aromatic ring optionally having a substituent group, and two among R 3 , R 4 , R 5 , and R 6 may form a methylene chain optionally having a substituent group or a (poly)methylenedioxy group optionally having a substituent group; R 8 denotes a hydrogen atom, an alkyl group, or an aryl group; z denotes a divalent group selected from an oxygen atom, a sulfur atom, NR N and Si(R Si ) 2 , R N denoting an alkyl, an aryl, an alkanesulfonyl, an arylsulfonyl, or an acyl group and R Si denoting an alkyl or an aryl group or Si(R Si ) 2 may form a ring; and in the formula (3-2), R 7 denotes an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, or an aryloxy group; R 9 denotes a hydrogen atom, an alkyl group, or an aryl group; and a denotes an integer of 0 or 1.

7. The process according to claim 5 , wherein the catalyst containing rhodium metal and an optically active bisphosphine is a compound defined by the following general formula (4):

[Rh(L) m (Y) n ]X  (4)

in the formula (4), L denotes an optically active bisphosphine defined by the following formula (5); Y denotes a nonconjugated diene compound; X denotes a counter anion; m denotes an integer of 1 or 2; n denotes an integer of 0 or 1; however, in the case where m=1, n=0 or n=1; and in the case where m=2, n=0:

R 10 R 11 P-Q-PR 12 R 13   (5)

in the formula (5), R 10 , R 11 , R 12 , and R 13 independently denote an aryl group optionally having a substituent group or a cycloalkyl group optionally having a substituent group; R 10 in combination with R 11 and/or R 12 in combination with R 13 may form a ring; and Q denotes a divalent arylene group optionally having a substituent group or a ferrocenediyl group.

8. The process according to claim 7 , wherein the catalyst containing rhodium metal and an optically active bisphosphine is used immediately after preparation.

9. The process according to claim 7 , wherein an olefin ligand is eliminated using hydrogen gas in preparing the catalyst containing rhodium metal and an optically active bisphosphine.

10. The process according to claim 6 , wherein the catalyst containing rhodium metal and an optically active bisphosphine is a compound defined by the following general formula (4):

[Rh(L) m (Y) n ]X  (4)

in the formula (4), L denotes an optically active bisphosphine defined by the following formula (5); Y denotes a nonconjugated diene compound; X denotes a counter anion; m denotes an integer of 1 or 2; n denotes an integer of 0 or 1; however, in the case where m=1, n=0 or n=1; and in the case where m=2, n=0:

R 10 R 11 P-Q-PR 12 R 13   (5)

in the formula (5), R 10 , R 11 , R 12 , and R 13 independently denote an aryl group optionally having a substituent group or a cycloalkyl group optionally having a substituent group; R 10 in combination with R 11 and/or R 12 , in combination with R 13 may form a ring; and Q denotes a divalent arylene group optionally having a substituent group or a ferrocenediyl group.

11. The process according to claim 8 , wherein an olefin ligand is eliminated using hydrogen gas in preparing the catalyst containing rhodium metal and an optically active bisphosphine.