NOVEL CLASS OF DNA BINDING MOTIFS BASED ON BISTETRAHYDROFURAN AND BISFURAN SKELETON WITH LONG ALKYL CHAINS
摘要:
Small molecules with DNA-binding affinity within the minor groove have become of great interest. In this paper, new DNA binding molecules; diamino-bistetrahydrofuran (bisTHF) and diamino-bisfuran are reported. The bisTHF ligand with RR configuration at the amino groups and C8 alkyl chains (RR8) stabilized GC-rich duplex. In contrast, bisfuran compounds stabilized AT-rich duplex. The binding affinity of RR8 with 12 mer duplex DNA was determined by isothermal titration calorimetry to be 3.3 x 10(8) M-1.
Novel acyclic ligands for metal cations based on the adjacent bistetrahydrofuran as analogs of natural Annonaceous acetogenins
摘要:
The acyclic ligands with an adjacent bistetrahydrofuran (THF) skeleton have been synthesized as analogs of bullatacin, a representative natural product in a family of Annonaceous acetogenins, and their binding properties toward metal cations have been investigated. The dihydroxyl bis-THF ligands with alkyl chains showed specific binding toward Ca2+, and those with acetamido groups exhibited potent binding with Ca2+ and Mg2+. The ligand with ether chains showed higher affinity toward Mg2+. These binding properties which depend on the nature of side chains and their stereochemistry have been analyzed by molecular modeling. (C) 1998 Elsevier Science Ltd. All rights reserved.
[3 + 2]-Annulation Reactions of Chiral Allylsilanes and Chiral Aldehydes. Studies on the Synthesis of Bis-tetrahydrofuran Substructures of Annonaceous Acetogenins
作者:Eric Mertz、Jennifer M. Tinsley、William R. Roush
DOI:10.1021/jo0511290
日期:2005.9.1
Double asymmetric [3 + 2]-annulation reactions of chiral β-silyloxyallylsilanes with chiral 2-tetrahydrofuranyl carboxaldehydes have been studied, leading to the stereocontrolled synthesis of six diastereomeric bis-tetrahydrofuran structures corresponding to the core subunits of members of the Annonaceous acetogenin family of natural products. Transition-state models are proposed to account for the
Efficient Protiodesilylation of Unactivated C(sp<sup>3</sup>)−SiMe<sub>2</sub>Ph Bonds Using Tetrabutylammonium Fluoride
作者:Cheryl L. Heitzman、William T. Lambert、Eric Mertz、J. Brad Shotwell、Jennifer M. Tinsley、Porino Va、William R. Roush
DOI:10.1021/ol0506821
日期:2005.6.1
[reaction: see text] The protiodesilylation of unactivated C(sp3)-SiMe2Ph bonds proceeds efficiently by treatment with tetrabutylammonium fluoride in wet DMF or THF via isolable dimethylsilanol intermediates.
Small molecules with DNA-binding affinity within the minor groove have become of great interest. In this paper, new DNA binding molecules; diamino-bistetrahydrofuran (bisTHF) and diamino-bisfuran are reported. The bisTHF ligand with RR configuration at the amino groups and C8 alkyl chains (RR8) stabilized GC-rich duplex. In contrast, bisfuran compounds stabilized AT-rich duplex. The binding affinity of RR8 with 12 mer duplex DNA was determined by isothermal titration calorimetry to be 3.3 x 10(8) M-1.
Novel acyclic ligands for metal cations based on the adjacent bistetrahydrofuran as analogs of natural Annonaceous acetogenins
The acyclic ligands with an adjacent bistetrahydrofuran (THF) skeleton have been synthesized as analogs of bullatacin, a representative natural product in a family of Annonaceous acetogenins, and their binding properties toward metal cations have been investigated. The dihydroxyl bis-THF ligands with alkyl chains showed specific binding toward Ca2+, and those with acetamido groups exhibited potent binding with Ca2+ and Mg2+. The ligand with ether chains showed higher affinity toward Mg2+. These binding properties which depend on the nature of side chains and their stereochemistry have been analyzed by molecular modeling. (C) 1998 Elsevier Science Ltd. All rights reserved.