Alkylation of lithium dienediolates of butenoic acids. Regioselectivity effects of structure and leaving group of the alkylating agent
作者:Maria J. Aurell、Salvador Gil、Ramon Mestres、Margarita Parra、Lilian Parra
DOI:10.1016/s0040-4020(98)00149-5
日期:1998.4
Regioselectivity of alkylation of but-2-enoic acids 1 and 2 by alkyl halides strongly depends on the reactivity of the electrophile. High α selectivity results for saturated alkyl halides, whereas poor α-selectivity is obtained for highly reactive allyl and benzyl halides. For reactive alkylating halides selectivity is partly governed by the ion pairing aggregates of the dienediolates. Lithium bromide
Halogen substituted metallocene compounds for olefin polymerization
申请人:Voskoboynikov Z. Alexander
公开号:US20070135594A1
公开(公告)日:2007-06-14
A metallocene compound is represented by the formula (1):
AMX
n-1
wherein M is a transition metal atom having a coordination number of n selected from Group 3, 4, 5 or 6 of the Periodic Table of Elements, or a lanthanide metal atom, or actinide metal atom; A is a substituted monocyclic or polycyclic arenyl ligand pi-bonded to M, wherein said arenyl ligand includes at least one halogen substituent directly bonded to any sp
2
carbon atom at a bondable ring position of the ligand; and the or each X is a univalent anionic ligand, or two X are joined and bound to the metal atom to form a metallocycle ring, or two X are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand.
Synthesis of the Macrolactone of Migrastatin and Analogues with Potent Cell-Migration Inhibitory Activity
作者:Luiz C. Dias、Fernanda G. Finelli、Leila S. Conegero、Renata Krogh、Adriano D. Andricopulo
DOI:10.1002/ejoc.201001097
日期:2010.12
The synthesis of the macrolactone core of migrastatin 2, its potent anti-metastasis analogue 34, and ester derivatives 35 and 38 are reported. The approach involves the use of a dihydroxylation reaction to establish the desired C-8 stereocenter followed by a metathesis cyclization reaction. The effects of the compounds on the migration and invasion of human breast cancer cells were evaluated by using
Synthesis of Migrastatin Analogues as Inhibitors of Tumour Cell Migration: Exploring Structural Change in and on the Macrocyclic Ring
作者:Daniele Lo Re、Ying Zhou、Joanna Mucha、Leigh F. Jones、Lorraine Leahy、Corrado Santocanale、Magdalena Krol、Paul V. Murphy
DOI:10.1002/chem.201502861
日期:2015.12.7
Migrastatin and isomigrastatin analogues have been synthesised in order to contribute to structure–activity studies on tumour cell migration inhibitors. These include macrocycles varying in ring size, functionality and alkene stereochemistry, as well as glucuronides. The synthesis work included application of the Saegusa–Ito reaction for regio‐ and stereoselective unsaturated macroketone formation
[EN] MIGRASTATIN ANALOG COMPOSITIONS AND USES THEREOF<br/>[FR] COMPOSITIONS DE SUBSTANCES ANALOGUES A LA MIGRASTATINE ET LEURS UTILISATIONS
申请人:CORNELL RES FOUNDATION INC
公开号:WO2004087672A1
公开(公告)日:2004-10-14
In one aspect, the present invention provides pharmaceutical compositions comprising a therapeutically effective amount of a compound of general formula (I), wherein R1-R6, Ra-RC, Q, Y1, Y2 and n are as defined herein, whereby the composition is formulated for administration to a subject at a dosage between about 0.1 mg/kg to about 50 mg/kg of body weight. In another aspect, the present invention provides a method for treating breast tumor metastasis in a subject comprising administering to a subject in need thereof a therapeutically effective amount of the inventive composition described directly above and a pharmaceutically acceptable carrier, adjuvant or vehicle.