Results 1 to 10 of about 56,559 (262)

Electrophilic Cyclization of Diterpenoids [PDF]

open access: yesChemistry Journal of Moldova, 2006
A review of diterpenoid cyclization initiated by electrophilic reagents is provided. Conventional protonic and Lewis acids are examined along with superacids as initiators of cyclization cascade. An emphasis is placed on the use of cyclization reactions as a tool for the synthesis of compounds with potential practical utility.
Veaceslav Kulciţki   +3 more
doaj   +4 more sources

A study towards the synthesis of (-)-atrop-abyssomicin C core [PDF]

open access: yesJournal of the Serbian Chemical Society, 2021
An attempt to synthesize the cyclohexane core of antibiotic abyssomicin C is described. The initial, protecting group-free approach (relying on internal protection) failed and had to be modified, in order to allow for efficient deprotection of the acid ...
Saičić Radomir N., Trmčić Milena
doaj   +1 more source

Cyclization mechanism and kinetics of poly(acrylonitrile-co-2-acrylamido-2-methylpropane sulfonic acid) copolymer investigated by FTIR spectroscopy

open access: yesPolymer Testing, 2021
Cyclization reaction of poly(acrylonitrile-co-2-acrylamido-2-methylpropane sulfonic acid) [P(AN-co-AMPS)] copolymer during thermal oxidative stabilization (TOS) process was investigated by FTIR and two dimensional (2D) correlation analysis technique. The
Zhipeng He   +8 more
doaj   +1 more source

Harnessing the cyclization strategy for new drug discovery

open access: yesActa Pharmaceutica Sinica B, 2022
The design of new ligands with high affinity and specificity against the targets of interest has been a central focus in drug discovery. As one of the most commonly used methods in drug discovery, the cyclization represents a feasible strategy to ...
Kai Tang   +4 more
doaj   +1 more source

To Cyclize or Not To Cyclize: Catching Enzyme Evolution in the Act [PDF]

open access: yesACS Chemical Biology, 2009
If you look at the biggest genes in soil and marine bacteria, you tend to see the chemical blueprints for making natural products such as peptides and polyketides. Over the past decade, collective efforts of enzymologists working with synthetic and analytical chemists have been catching up with the data dump from microbial genome sequencing.
Bradley S, Evans, Neil L, Kelleher
openaire   +2 more sources

6-Endo-dig cyclization: Flexible enforce to develop synthetic route in organic syntheses

open access: yesResults in Chemistry, 2023
The organic ring closure reaction of diverse acyclic compounds is governed mostly by the Baldwin rule. The ring closure compounds shows emergent application.
Vembu Yogeshwaran   +3 more
doaj   +1 more source

Cyclization-activated Prodrugs [PDF]

open access: yesMolecules, 2007
Many drugs suffer from an extensive first-pass metabolism leading to druginactivation and/or production of toxic metabolites, which makes them attractive targets forprodrug design. The classical prodrug approach, which involves enzyme-sensitive covalentlinkage between the parent drug and a carrier moiety, is a well established strategy toovercome ...
Paula Gomes, Nuno Vale, Rui Moreira
openaire   +5 more sources

Influence of Monomer Sequence on the Cyclization Behavior of Poly(acrylonitrile-co-acrylamide)

open access: yesApplied Sciences, 2023
In this research, we have developed the approach to controlled synthesis of acrylonitrile-acrylamide copolymers with narrow molecular weight distribution and various monomer sequence distributions.
Roman V. Toms   +5 more
doaj   +1 more source

Unified short syntheses of oxygenated tricyclic aromatic diterpenes by radical cyclization with a photoredox catalyst

open access: yesCommunications Chemistry, 2023
The biomimetic two-phase strategy employing polyene cyclization and subsequent oxidation/substitution is an effective approach for divergent syntheses of [6-6-6]-tricyclic diterpenes.
Riichi Hashimoto   +3 more
doaj   +1 more source

Study on by-products synthesis of powder coating polyester resin catalyzed by organotin

open access: yese-Polymers, 2023
In the production of powder-coating polyester, a strong odor emanates from the water, prompting us to investigate its composition and origin. We studied the process of powder coating epoxy/polyester 50/50, which employs butyl tin tris (2-ethyl hexanoate)
Yang YuCheng, Di Chao, Wang TingWei
doaj   +1 more source

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