Synthesis, redox properties, and conformational analysis of vicinal disulfide ring mimics
摘要:
A vicinal disulfide ring (VDR) results from disulfide-bond formation between two adjacent cysteine residues. This eight-membered ring is a rare motif in protein structures and is functionally important to those few proteins that posses it. This article focuses on the construction of strained and unstrained VDR mimics, discernment of the preferred conformation of these mimics, and the determination of their respective disulfide redox potentials. (C) 2008 Elsevier Ltd. All rights reserved.
Direct Preparation of (Z,Z)-1,4-Dienic Units with a New C6 Homologating Agent: Synthesis of α-Linolenic Acid
作者:Jacqueline Sandri、Jacques Viala
DOI:10.1055/s-1995-3906
日期:1995.3
Syntheses of two C6 homologating agents 2a and 2f are described. These agents allow direct access to the (Z,Z)-1,4-diene unit 3, a moiety present in a wide number of natural compounds. Compound 2a is prepared in 40% overall yield by selective epoxidation of methoxycyclohexa-1,4-diene followed by oxidative ring cleavage and transacetalization. Compound 2f is obtained in 90% yield by a one-step oxidative dimerization of phosphonium salt 1. A short synthetic application of these two new C6 homologating agents to the synthesis of α-linolenic acid is described.
Efficient and Stereospecific Synthesis of (z)-Hex-3-Enedioic Acid, a Key Intermediate for Gly-Gly <i>cis</i> Olefin Isostere
作者:Nurit Perlman、Amnon Albeck
DOI:10.1080/00397910008087071
日期:2000.12.1
Abstract (z)-Hex-3-enedioic acid, a keyintermediate in the synthesis of (z)-5-amino-3-pentenoic acid (a Gly-Gly cis olefin isostere), was synthesized by a short and efficient procedure of sequential oxidations. Thus, selective mono epoxidation of 1,4-cyclohexadiene was followed by periodate oxidation to the appropriate dialdehyde. Finally, Jones oxidation of the dialdehyde afforded the corresponding
Synthesis and properties of disulfide-bond containing eight-membered rings
作者:Erik L. Ruggles、Robert J. Hondal
DOI:10.1016/j.tetlet.2006.04.023
日期:2006.6
The cyclocystine ring structure (CRS, 3), which results from a disulfide-bond between adjacent cysteine residues, is a rare motif in protein structures and is functionally important to those few proteins that posses it. This letter will focus on the construction of CRS mimics and the determination of their respective redox potentials. (c) 2006 Elsevier Ltd. All rights reserved.
JPS5533460A
申请人:——
公开号:JPS5533460A
公开(公告)日:1980-03-08
HIGH CAPACITY MAGNETIC NANOPARTICLES AS SUPPORTS FOR REAGENTS AND CATALYSTS
申请人:Hanson Paul Ronald
公开号:US20120226007A1
公开(公告)日:2012-09-06
A magnetic particle-polymer hybrid material can include: a substance having a structure of Z-(Y-Triazole-X-(FP)
n
)
m
, (Formula 1), wherein Z is a magnetic particle smaller than 1 mm; n and m are independently integers; Y includes an alkyl or aryl linker linked to the magnetic particle; X is a carbon or heteroatom; FP is a functionalized polymer having: a first norbornenyl reaction product linked to the magnetic particle through the Y-Triazole-X linker; and one or more monomers each including a second norbornenyl reaction product, where one of the monomers is linked to the first norbornenyl reaction product, each monomer include a functional group capable of binding with another substance.