申请人:Minowa Nobuto
公开号:US20090221851A1
公开(公告)日:2009-09-03
The present invention is a process for producing optically active aminophosphinylbutanoic acids represented by the formula (2)
(in the formula (2), R
1
represents an alkyl group having 1 to 4 carbon atom(s), R
2
represents hydrogen atom or an alkyl group having 1 to 4 carbon atom(s), R
3
represents an alkyl group having 1 to 4 carbon atom(s), an alkoxy group having 1 to 4 carbon atom(s), an aryl group, an aryloxy group, or a benzyloxy group, and R
4
represents hydrogen atom or an alkyl group having 1 to 4 carbon atom(s); and * represents an asymmetric carbon atom), wherein a compound represented by the formula (1)
(in the formula (1), R
1
represents an alkyl group having 1 to 4 carbon atom(s), R
2
represents hydrogen atom or an alkyl group having 1 to 4 carbon atom(s), R
3
represents an alkyl group having 1 to 4 carbon atom(s), an alkoxy group having 1 to 4 carbon atom(s), an aryl group, an aryloxy group, or a benzyloxy group, and R
4
represents hydrogen atom or an alkyl group having 1 to 4 carbon atom(s))
is asymmetrically hydrogenated in the presence of a ruthenium-optically active phosphine complex. With the process for the production, a compound useful in a herbicide such as L-AHPB can be produced with good efficiency and high asymmetric yield.
本发明涉及一种制备光学活性氨基膦基丁酸的方法,其化学式为(2)(在化学式(2)中,R1代表具有1至4个碳原子的烷基,R2代表氢原子或具有1至4个碳原子的烷基,R3代表具有1至4个碳原子的烷基、具有1至4个碳原子的烷氧基、芳基、芳氧基或苄氧基,R4代表氢原子或具有1至4个碳原子的烷基;*代表不对称碳原子),其中在钌-光学活性膦配合物的存在下,化学式(1)所表示的化合物(在化学式(1)中,R1代表具有1至4个碳原子的烷基,R2代表氢原子或具有1至4个碳原子的烷基,R3代表具有1至4个碳原子的烷基、具有1至4个碳原子的烷氧基、芳基、芳氧基或苄氧基,R4代表氢原子或具有1至4个碳原子的烷基)进行不对称氢化。通过该制备方法,可以高效率、高对映选择性地制备出一种在除草剂中有用的化合物,如L-AHPB。