Process for preparing (trans)-4-substituted-DL-proline derivatives
申请人:E.R. SQUIBB & SONS, INC.
公开号:EP0379063A2
公开(公告)日:1990-07-25
A process is provided for preparing (trans)-4-phenyl-DL-proline derivatives, which are useful in preparing certain angiotensin converting enzyme inhibitors, which process involves reacting an ester of the structure
wherein X is a leaving group such as tosylate, R³ is lower alkyl, R is cyclohexyl, phenyl or substituted phenyl, and R1a is a protecting group, with a potassium amide base such as potassium hexamethyldisilazide under reduced temperatures to form the trans-4-substituted proline ester derivative of the structure
then hydrolyzing the proline ester to the acid of the structure
and removing the R1a nitrogen protecting group to form the unprotected acid of the structure
β-Hairpin peptidomimetics of the general formula Cyclo(-Xaa
1
-Xaa
2
-Xaa
3
-Cys
4
-Xaa
5
-Xaa
6
-Xaa
7
-Xaa
8
-Arg
9
-Tyr
10
-Cys
11
-Xaa
12
-Xaa
13
-Xaa
14
-Xaa
15
-Xaa
16
-), disulfide bond between Cys
4
and Cys11, and pharmaceutically acceptable salts thereof, with Xaa
1
, Xaa
2
, Xaa
3
, Xaa
5
, Xaa
6
, Xaa
7
, Xaa
8
, Xaa
12
, Xaa
13
, Xaa
14
, Xaa
15
and Xaa
16
being amino acid residues of certain types which are defined in the description and the claims, have CXCR4 antagonizing properties and can be used for preventing HIV infections in healthy individuals or for slowing and halting viral progression in infected patients; or where cancer is mediated or resulting from CXCR4 receptor activity; or where immunological diseases are mediated or resulting from CXCR4 receptor activity; or for treating immunosuppression; or during apheresis collections of peripheral blood stem cells and/or as agents to induce mobilization of stem cells to regulate tissue repair. These peptides can be manufactured by a process which is based on a mixed solid- and solution phase synthetic strategy.
MODULATION OF STRUCTURED POLYPEPTIDE SPECIFICITY
申请人:BicycleRD Limited
公开号:US20210122786A1
公开(公告)日:2021-04-29
The invention describes peptide ligands specific for human plasma Kallikrein.