申请人:Kotthaus Martina
公开号:US20070112216A1
公开(公告)日:2007-05-17
The invention relates to a method for producing chiral mercapto amino acids of formula (I) wherein R
1
, R
2
and R
3
can represent hydrogen, C
6
-C
12
aryl, C
1
-C
6
-alkyl-C
6
-C
12
-aryl, C
6
-C
12
-aryl-C
1
-C
6
-alkyl, C
1
-C
18
-alkyl or C
2
-C
18
-alkenyl, R
2
and R
3
forming a saturated or unsaturated ring. According to said method, a) an oxo compound of formula (II), wherein X represents a leaving group, is reacted in the presence of ammonia or ammonium hydroxide and a sulfide, optionally under phase transfer catalysis or addition of a solubiliser, with a ketone or an aldehyde of formula (III) wherein R
4
and R
5
can represent a C
1
-C
12
alkyl radical or a C
6
-C
20
aryl radical or one of the two radicals H, or R
4
and R
5
together form a C
4
-C
7
ring, to form the compound of formula (IV), that b) reacts with HCN to form the corresponding nitrile, whereupon c) the crystallised nitrile is converted, by selective hydrolysis by means of a mineral acid, into the corresponding amide of formula (VI), and d) is then converted into the corresponding chiral amide of formula (VI*) by means of an L amidase or a chiral dissociating acid, whereupon by reaction with an acid, the desired chiral mercapto amino acid of formula (I) is obtained, or e) first the reaction with an acid is carried out, and then the conversion into the chiral mercapto amino acid takes place.
该发明涉及一种生产手性巯基氨基酸的方法,其化学式为(I),其中R1、R2和R3可以代表氢、C6-C12芳基、C1-C6烷基-C6-C12芳基、C6-C12芳基-C1-C6烷基、C1-C18烷基或C2-C18烯基,R2和R3形成饱和或不饱和环。根据该方法,a)在氨或氢氧化铵存在下,将具有化学式(II)的羰基化合物,其中X代表离去基团,与具有化学式(III)的酮或醛反应,其中R4和R5可以代表C1-C12烷基基团或C6-C20芳基基团或两个基团H中的一个,或者R4和R5一起形成C4-C7环,形成具有化学式(IV)的化合物,然后b)与HCN反应形成相应的腈,随后c)通过矿酸的选择性水解将结晶的腈转化为具有化学式(VI)的相应酰胺,并且d)通过L-酰胺酶或手性分离酸将其转化为具有化学式(VI*)的相应手性酰胺,然后通过与酸的反应得到所需的手性巯基氨基酸,或者e)首先进行与酸的反应,然后进行转化为手性巯基氨基酸。