CHIRAL IRIDIUM AQUA COMPLEX AND METHOD FOR PRODUCING OPTICALLY ACTIVE HYDROXY COMPOUND USING THE SAME
申请人:Carreira Erick M.
公开号:US20110137049A1
公开(公告)日:2011-06-09
The invention provides a chiral iridium aqua complex which has good preservation stability, can be easily produced, and enables asymmetric transfer hydrogenation in a higher yield and with higher stereoselectivity. The chiral iridium aqua complex has the formula (1A):
wherein
R
a
, R
b
, R
c
, R
d
and R
e
are the same or different and each is a hydrogen atom, a methyl group, an ethyl group or a phenyl group,
R
1
and R
2
are the same or different and each is an aryl group optionally having substituent(s), or
R
1
and R
2
in combination show a C
3-4
straight chain alkylene group optionally having substituent(s) to form a ring,
R
3
is an alkylsulfonyl group optionally having substituent(s) or an arylsulfonyl group optionally having substituent(s),
R
4
is a hydrogen atom, an alkylsulfonyl group optionally having substituent(s) or an arylsulfonyl group optionally having substituent(s),
X is a monovalent or divalent anion, and
n is 2 when X is a monovalent anion, or n is 1 when X is a divalent anion,
and a production method of an optically active hydroxy compound using the complex.
本发明提供了一种手性的铱水合物配合物,具有良好的保持稳定性,易于生产,并且能够在更高的产率和立体选择性下进行不对称转移氢化反应。该手性铱水合物配合物的化学式为(1A):其中,Ra、Rb、Rc、Rd和Re是相同或不同的氢原子、甲基基团、乙基基团或苯基基团;R1和R2是相同或不同的芳基基团,可选地具有取代基,或者R1和R2组合形成一个C3-4直链烷基链,可选地具有取代基,形成一个环;R3是一个烷基磺酰基,可选地具有取代基,或者是一个芳基磺酰基,可选地具有取代基;R4是一个氢原子,一个烷基磺酰基,可选地具有取代基,或者是一个芳基磺酰基,可选地具有取代基;X是一价或二价的阴离子;当X是一价阴离子时,n为2;当X是二价阴离子时,n为1。本发明还提供了使用该配合物制备光学活性羟基化合物的方法。