A process for producing an enantiomerically enriched, pure or enriched and essentially pure compound of Formula I:
wherein the R-, or S-configuration at the stereogenic center is marked with an *; which process hydrogenates an enamide compound of formula III:
in an organic solvent in the presence of a transition metal precursor complexed to a chiral phosphine ligand catalyst;
wherein Ar is phenyl which is unsubstituted or substituted;
Z is OR
1
, SR
1
and NR
1
R
2
; and P is R
3
, OR
3
, and NR
3
R
4
;
R
1
and R
2
are selected from H, C
1-8
alkyl, C
5-12
cycloalkyl, aryl and aryl-C
1-2
-alkyl; or R
1
and R
2
together with the nitrogen atom to which they are attached form a C
4-7
-member heterocyclic ring system optionally fused with a 5- to 6-member carbocyclic or heterocyclic ring system; and
R
3
and R
4
are selected from H, C
1-8
alkyl, aryl, C
5-12
cycloalkyl and aryl-C
1-2
-alkyl; or R
3
and R
4
together with the nitrogen atom to which they are attached form a C
4-7
-member heterocyclic ring system.
一种制备式I化合物的对映体富集、纯或富集和基本纯的过程,其中,在手性
磷配体催化剂的配合下,将式III的烯酰胺化合物在有机溶剂中加氢,其中,在立体异构中心处的R-或S-构型用*标记;其中,Ar是未取代或取代的苯基;Z是OR1、SR1和NR1R2;P是R3、OR3和NR3R4;R1和R2选自H、C1-8烷基、C5-12环烷基、芳基和芳基-C1-2-烷基;或者R1和R2与它们连接的氮原子一起形成一个C4-7成员的杂环系统,可选地与一个5-至6-成员的碳环或杂环系统融合;R3和R4选自H、C1-8烷基、芳基、C5-12环烷基和芳基-C1-2-烷基;或者R3和R4与它们连接的氮原子一起形成一个C4-7成员的杂环系统。