A rapid access to coumarin derivatives (using Vilsmeier–Haack and Suzuki cross-coupling reactions)
摘要:
A four-step preparation of compounds containing a coumarinic moiety is presented. This synthesis involves notably a Suzuki cross-coupling reaction (performed in aqueous Media) and a ring closure by formation of delta-lactone. (C) 2002 Elsevier Science Ltd. All rights reserved.
A rapid access to coumarin derivatives (using Vilsmeier–Haack and Suzuki cross-coupling reactions)
摘要:
A four-step preparation of compounds containing a coumarinic moiety is presented. This synthesis involves notably a Suzuki cross-coupling reaction (performed in aqueous Media) and a ring closure by formation of delta-lactone. (C) 2002 Elsevier Science Ltd. All rights reserved.
Cascade C-C and C-N Bond Formation: A Straightforward Synthesis of Phenanthridines and Fused Quinolines
作者:Ashwini Borah、Pranjal Gogoi
DOI:10.1002/ejoc.201600220
日期:2016.4
Pd-catalyzed cascade process has been developed for the synthesis of quinoline and phenanthridine derivativesfrom various β-chloro α,β-unsaturatedaldehydes and 2-chloroaryl aldehydes, respectively, in good to high yields. The reaction proceeds through Pd-catalyzed cascade carbon–carbon and carbon–nitrogen bond formation in a single reaction vessel. The requisite β-chloro α,β-unsaturatedaldehydes were efficiently
Synthesis of Pyridine-Fused Ring Systems from β-Chloroacroleins: A Comparison of Three Different Pathways
作者:Gilbert Kirsch、Stéphanie Hesse
DOI:10.1055/s-2003-38081
日期:——
Three different pathways for the access of pyridine-fused ring systems are described: 1) a Sonogashira coupling of β-chloroacroleins followed by cyclization of the corresponding imines; 2) the same coupling reaction followed by cyclization of the corresponding oximes; and 3) a palladium-catalyzed iminoannulation of internal alkynes.
Bi-functional complexes and methods for making and using such complexes
申请人:Gouliaev Alex Haahr
公开号:US11225655B2
公开(公告)日:2022-01-18
The present invention is directed to a method for the synthesis of a bi-functional complex comprising a molecule part and an identifier oligonucleotide part identifying the molecule part. A part of the synthesis method according to the present invention is preferably conducted in one or more organic solvents when a nascent bi-functional complex comprising an optionally protected tag or oligonucleotide identifier is linked to a solid support, and another part of the synthesis method is preferably conducted under conditions suitable for enzymatic addition of an oligonucleotide tag to a nascent bi-functional complex in solution.
Synthesis and biological evaluation of guanylhydrazone coactivator binding inhibitors for the estrogen receptor
作者:Andrew L. LaFrate、Jillian R. Gunther、Kathryn E. Carlson、John A. Katzenellenbogen
DOI:10.1016/j.bmc.2008.10.007
日期:2008.12
Most patients with hormone-responsive breast cancer eventually develop resistance to traditional antiestrogens such as tamoxifen, and this has become a major obstacle in their treatment. We prepared and characterized the activity of a series of 16 guanylhydrazone small molecules that are designed to block estrogen receptor (ER) activity through a non-traditional mechanism, by directly interfering with coactivator binding to agonist-liganded ER. The inhibitory activity of these compounds was determined in cell-based transcription assays using ER-responsive reporter gene and mammalian two-hybrid assays. Several of the compounds gave IC50 values in the low micromolar range. Two secondary assays were used to confirm that these compounds were acting through the proposed non-traditional mode of estrogen inhibitory action and not as conventional antagonists at the ligand binding site. (c) 2008 Elsevier Ltd. All rights reserved.