stereoselective total synthesis of jomthonic acid A is described. The key features of the synthetic strategy are a Sharpless asymmetric epoxidation, a Gilmann reagent-induced methylation, a Mitsunobu reaction, a Yamaguchi esterification, and an O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate (TBTU)-mediated amide coupling. Jomthonic acid A is an architecturally rare amino acid containing
描述了乔松酸 A 的立体选择性全合成。该合成策略的关键特征是 Sharpless 不对称环氧化、吉尔曼试剂诱导的甲基化、光信反应、山口酯化和 O-(苯并三唑-1-基)-N,N,N',N'-四甲基脲四氟硼酸盐 (TBTU) 介导的酰胺偶联。Jomthonic acid A 是一种结构上罕见的氨基酸,包含一个 β-甲基苯丙氨酸残基和一个 4-甲基-(2E,4E)-六-2,4-二烯酸酯部分。当针对小鼠 ST-13 前脂肪细胞进行测试时,它显示出抗糖尿病和抗动脉粥样硬化活性。
Asymmetric synthesis of unusual amino acids: Synthesis of optically pure isomers of β-methylphenylalanine
作者:Ramalinga Dharanipragada、Ernesto Nicolas、Geza Toth、Victor J. Hruby
DOI:10.1016/s0040-4039(01)93366-0
日期:1989.1
All the four individual isomers of β-methylphenylalanine have been synthesized in very high optical purities by utilizing in part the chiral imide enolate bromination methodology of Evans and co-workers.
A New Strategy for the Synthesis of Four Individual Isomers of β-Methylphenylalanine
作者:Feng-Di Lung、Guigen Li、Bith-Show Lou、Victor J. Hruby
DOI:10.1080/00397919508010789
日期:1995.1
Abstract The application of an allylic strain effect in boron enolates and asymmetric Michael-like addition/electrophilic bromination reactions is reported for the asymmetric synthesis of the individual isomers of unusual constrained amino acids. For β-substituted α-amino acids, all of the final optically pure products were identical to authentic samples, which provided further and unequivocal evidence
DHARANIPRAGADA, RAMALINGA;NICOLAS, ERNESTO;TOTH, GEZA;HRUBY, VICTOR J., TETRAHEDRON LETT., 30,(1989) N9, C. 6841-6844
作者:DHARANIPRAGADA, RAMALINGA、NICOLAS, ERNESTO、TOTH, GEZA、HRUBY, VICTOR J.
DOI:——
日期:——
[EN] CCK AND/OR GASTRIN RECEPTOR LIGANDS<br/>[FR] LIGANDS POUR LES RECEPTEURS DE LA CCK ET/OU LA GASTRINE
申请人:FERRING B.V.
公开号:WO1993020099A2
公开(公告)日:1993-10-14
(EN) This invention relates to novel compounds with the general structure A-B-C and their pharmaceutically acceptable salts, to medicinal compositions containing them, and to the use of such medicinal compositions in the treatment of certain disease states. The compounds of the invention are represented schematically as A-B-C wherein S1-S4 are in general lypophilic residues, S5 is a polar or hydrophilic residue, and L1-L5 are optional linking units. The compounds of this invention bind to CCK and/or gastrin receptors with high affinity and are therefore useful in the treatment of diseases which involve the dysfunction of a physiological process regulated by either of these hormones.(FR) Cette invention concerne de nouveaux composés de la structure générale A-B-C et leurs sels acceptables sur le plan pharmaceutique, des compositions médicinales les contenant et l'utilisation de telles compositions médicinales pour le traitement de certaines maladies. Les composés de l'invention sont représentés schématiquement par A-B-C où S1-S4 sont d'une façon générale des groupements lipophiles, S5 est un groupement polaire ou hydrophile et L1-L5 sont des unités de liaison facultatives. Les composés de cette invention se fixent aux récepteurs de la cholécystokinine et/ou de la gastrine avec une très grande affinité et sont donc utiles pour le traitement de maladies découlant d'un dysfonctionnement d'un processus physiologique régulé par l'une ou l'autre de ces hormones.