[EN] CYCLIC PEPTIDES AS C5 A RECEPTOR ANTAGONISTS<br/>[FR] PEPTIDES CYCLIQUES EN TANT QU'ANTAGONISTES DU RÉCEPTEUR C5
申请人:PFIZER
公开号:WO2018020358A1
公开(公告)日:2018-02-01
The invention relates to cyclic peptide derivatives, to their use in medicine, to compositions containing them, to processes for their preparation and to intermediates used in such processes. More particularly the invention relates to cyclic peptide C5a receptor antagonists of formula (Ia)or formula (Ib), or pharmaceutically acceptable salts thereof,wherein R1a, R1b, R2, R3 and R4 areas defined in the description. C5a receptor antagonists are potentially useful in the treatment of a wide range of 1 disorders,including inflammatory disorders and immune disorders.
The facile synthesis of a series of tryptophan derivatives
作者:Georg Blaser、John M. Sanderson、Andrei S. Batsanov、Judith A.K. Howard
DOI:10.1016/j.tetlet.2008.02.120
日期:2008.4
of 5- and 6-substituted tryptophan derivatives that are difficult to prepare using alternative enzymatic approaches. Acylation of an activated amino acid, derived from serine in situ, is coupled with an enzymatic resolution step to furnish enantiopure analogues bearing a range of electron withdrawing and releasing substituents. Isolation of a dehydroalanine derivative as a by-product from some reactions
Rapid and efficient syntheses of tryptophans using a continuous-flow quaternization–substitution reaction of gramines with a chiral nucleophilic glycine equivalent
continuous-flow quaternization reaction of gramines with MeI (<1 min) followed by a substitution reaction with a chiral nucleophilic glycine-derived Ni-complex (S)-2 (<1 min) has successfully been developed to afford the corresponding alkylated Ni-complexes 3 in good yields with excellent diastereoselectivity, based on the results of a one-pot quaternization–substitution reaction of gramines with (S)-2 in
成功开发了禾本科植物与 MeI 的连续流动季铵化反应(<1 分钟),然后与手性亲核甘氨酸衍生的 Ni-络合物 ( S )- 2进行取代反应(<1 分钟),得到相应的烷基化 Ni - 基于禾本科化合物与 ( S )- 2在间歇过程中的一锅季铵化-取代反应的结果,以良好的产率和出色的非对映选择性配合物3。连续流动过程允许安全有效地放大合成3j(84% 产率,99% de,540 gh -1),得到 7-氮杂色氨酸衍生物 ( S )- 4j很容易通过酸催化的水解反应,然后用 Fmoc 基团保护。本方法以多种禾本科和( S ) -2为原料快速高效合成对映体纯非天然色氨酸衍生物,将有助于进一步促进多肽和蛋白质药物的发现和开发研究。
CYCLIC PEPTIDES AS C5 A RECEPTOR ANTAGONISTS
申请人:Pfizer Inc.
公开号:EP3491005A1
公开(公告)日:2019-06-05
Cyclic Peptides As C5a Receptor Antagonists
申请人:Pfizer Inc.
公开号:US20190270778A1
公开(公告)日:2019-09-05
The invention relates to cyclic peptide derivatives, to their use in medicine, to compositions containing them, to processes for their preparation and to intermediates used in such processes. More particularly the invention relates to cyclic peptide C5a receptor antagonists of formula (Ia) or formula (Ib), or pharmaceutically acceptable salts thereof, wherein R
1a
, R
1b
, R
2
, R
3
and R
4
areas defined in the description. C5a receptor antagonists are potentially useful in the treatment of a wide range of 1 disorders, including inflammatory disorders and immune disorders.