Catalytic asymmetric direct aldol reaction of α-alkyl azlactones and aliphatic aldehydes
作者:Yang Zheng、Li Deng
DOI:10.1039/c5sc02116b
日期:——
An unprecedented highly diastereoselective and enantioselective aldol reaction of [small alpha]-alkyl azlactones and aliphaticaldehydes was achieved with cinchona alkaloid catalysts. To our knowledge, this reaction provides the first useful catalytic...
Asymmetric Synthesis of Functionalizable Type II β-Turn-Inducing α-Amino Acid Building Blocks
作者:Wenzheng Gao、Jiaxin Han、Sophie Greaves、Joseph P. A. Harrity
DOI:10.1021/acs.orglett.3c02376
日期:2023.9.8
α-amino acids, and in so doing, the side chain is sacrificed during the ring-forming process. We report a new asymmetric approach to lactam-constrained α-amino acid building blocks bearing a range of polar and hydrophobic side chains. The chemistry is amenable to rapidly generating di- and tripeptides, and the potential for these lactams to stabilize type II β-turns is demonstrated in the synthesis of the
肽模拟物正在成为一类有前途的有效和选择性疗法。在目前这些化合物的方法中,限制性内酰胺的利用是增强活性肽构象的关键因素,开发有效和立体控制的方法来生成此类内酰胺结构单元是一个重要目标。目前的方法通常依赖于现有 α-氨基酸的精制,这样做时,侧链在成环过程中被牺牲。我们报告了一种新的不对称方法,用于构建带有一系列极性和疏水侧链的内酰胺限制的 α-氨基酸结构单元。该化学物质适合快速生成二肽和三肽,并且这些内酰胺稳定 II 型 β 转角的潜力在黑素细胞抑制因子拟肽的合成中得到了证明。
Acylalkylaminocarbonyl substituted amino and imino acid compounds
申请人:E.R. Squibb & Sons, Inc.
公开号:EP0103496A1
公开(公告)日:1984-03-21
This invention provides new compounds of the formula
as more fully defined herein. These compounds are useful as hypotensive agents due to their angiotensin converting enzyme inhibition activity and, depending upon the definition of X, may also be useful as analgesics due to their enkephalinase inhibition activity.
本发明提供了如下式的新化合物
的新化合物。由于这些化合物具有血管紧张素转换酶抑制活性,因此可用作降血压药,而且根据 X 的定义,由于它们具有脑啡肽酶抑制活性,因此也可用作镇痛药。
Hydroxy substituted ureido amino and imino acids
申请人:E.R. Squibb & Sons, Inc.
公开号:EP0159156A1
公开(公告)日:1985-10-23
New compounds are disclosed having the formula
wherein R1, R2, R3, n and X are as defined hereinafter. These new compounds are useful as hypotensive agents due to their angiotensin converting enzyme inhibition activity and. depending upon the definition of X, may also be useful as analgesics due to their enkephalinase inhibition activity.
这些新化合物具有血管紧张素转换酶抑制活性,因此可用作降血压药;根据 X 的定义,它们还具有脑啡肽酶抑制活性,因此也可用作镇痛药。
Novel peptidase inhibitors
申请人:MERRELL DOW PHARMACEUTICALS INC.
公开号:EP0195212A2
公开(公告)日:1986-09-24
This invention relates to analogs of peptidase substrates in which the amide group containing the scissile amide bond of the substrate peptide has been replaced by an activated electrophilic ketone moiety. These analogs of the peptidase substrates provide specific enzyme inhibitors for a variety of proteases, the inhibition of which will have useful physiological consequences in a variety of disease states.