Natural amines

Part 3 book "Chemistry" by author Catherine E. Housecroft includes content: Amines, aromatic compounds, carbonyl compounds, aromatic heterocyclic compounds, molecules in nature, chemistry in the workplace.

424p muasambanhan10 06-04-2024 1 0   Download

Ebook "Hypervalent iodine chemistry" provides readers with contents including: hypervalent iodine-induced oxidative couplings (new metal-free coupling advances and their applications in natural product syntheses); phenol dearomatization with hypervalent iodine reagents; oxidative heterocycle formation using hypervalent iodine(III) reagents; aminations with hypervalent iodine;...

320p tudohanhtau1006 29-03-2024 2 1   Download

Ebook "Stereoselective formation of amines (Topics in Current chemistry, Volume 343)" contains valuable and insightful contributions from several leading experts in this field, and the reviews within collectively provide an overview of a diverse set of valuable approaches as well as their implementation toward natural product and pharmaceutical synthesis.

292p tudohanhtau1006 29-03-2024 4 1   Download

Ebook "ICGSCE 2014: Proceedings of the international conference on global sustainability and chemical engineering" includes selected papers from the ICGSCE 2014 with focus on the current trends of global resources used to meet the growing demands to improve life style coupled with environmental and social problems related to the resource consumption with emphasize to move towards sustainable development.

403p tudohanhtau1006 29-03-2024 5 1   Download

Several novel of polymethoxyquercetin Mannich base derivatives (2-7) were synthesized through O-methylation and based on Mannich reaction with various secondary amines and formaldehyde, starting from abundant and inexpensive natural sources quercetin.

8p vimarillynhewson 02-01-2024 1 1   Download

Part 2 book "Safety-scale laboratory experiments for chemistry for today general, organic, and biochemistry" includes content: Reactions of aldehydes and ketones; reactions of carboxylic acids, amines, and amides; the synthesis of aspirin and other esters; identifying functional groups in unknowns; synthetic polymers; dyes, inks, and food colorings; a study of carbohydrates; preparation of soap by lipid saponification; isolation of natural products - trimyristin and cholesterol; amino acids and proteins;... and other contents.

262p muasambanhan03 02-01-2024 3 2   Download

In most cases, herbal supplements found in illegal centers and herbal medicine stores have harmful content that causes irreparable damage to people. As a representative of the green chemistry method, a rapid and efficient dispersive micro solid-phase extraction (D-mSPE) method was applied to extract dexamethasone adulterant from handmade supplements sold as power natural enhancing materials.

11p lyhuyenthu 31-01-2023 7 2   Download

While current trends in Green Analytical Chemistry aim at reducing or simplifying sample treatment, food usually comprises complex matrices where direct analysis is not possible in most cases. In this context, sample treatment plays a pivotal role. Biogenic amines are naturally formed in many foodstuffs due to the action of microorganisms, while their presence has been associated with adverse health effects.

7p viginny 23-12-2022 7 3   Download

This paper presents some results of the evaluation of the Ecological properties of cotton fabric and silk fabric dyed with colorants extracted from the Terminalia T. catappa leaves. The ecological criteria are standardized according Okotex: pH value of Cotton fabric is 6.2, of silk fabrics is 6.

4p chauchaungayxua11 23-03-2021 34 6   Download

In acetonitrile, the amine became a catalyst to form 6-bromo-3-(5-bromo-2-hydroxybenzyl)-2-phenyl-4Hchromen-4-one. Under microwave conditions, it took about 20 min to complete the reaction and gave the same yields as theconventional method. Structures of these compounds were firm with NMR, MS spectra.

6p tamynhan5 10-12-2020 10 2   Download

The results show the iPrEug coordinates with Pt(II) through ethylenic double bond of the allyl group and C5 of the benzene ring, while the amines only coordinate with Pt(II) via the N heteroatom and occupy cis-position in comparison with the allyl group.

7p tamynhan9 02-12-2020 6 2   Download

In nature, the most common representatives are 2-amino acids (α-amino acids) with the general formula RCH(NH2)COOH. This chapter provides knowledge of amino acids. The main contents of this chapter include all of the following: structure and properties of amino acids, synthesis of amino acids: a combination of amine and carboxylic acidchemistry,...and other contents.

37p larachdumlanat122 26-11-2020 20 1   Download

After attending lectures, reading the text and working assigned problems related to this chapter, students will have acquired the following knowledge and abilities: Given the IUPAC name for a compound containing an amine functional group, be able to draw its structure; know the orbital mechanism for inversion at a pyramidal amine nitrogen; know how the relative electronegativity of N vs. O affects the boiling point, solubility, and basicity of amines vs. alcohols;...

27p larachdumlanat122 26-11-2020 13 0   Download

Apart from its numerous biological activities like antidiabetic, anti-infammatory, antimicrobial, pyrazine moiety plays an important role in luminescent materials. Its role in luminescent materials is due to its highly electron deficient nature specially when it is in the centre along the mainstay of extended π-conjugated systems.

9p vijiraiya2711 27-05-2020 14 1   Download

The present investigation was carried out for evaluation of the status of DTPA-Fe, Cu, Mn and Zn in relation with chemical properties in soils of Solapur district for this purpose representative soil samples were collected from different villages of Solapur district. The micronutrient and some important soil physico-chemical properties were investigated by using GPS and GIS techniques. Considering the critical limits of soil micronutrients, all soil associations were not adequately supplied with DTPA extractable micronutrients.

12p nguaconbaynhay3 07-02-2020 10 0   Download

2,4-D amine and 2,4-D isooctylester were sprayed repeatedly in the spring of 5 consecutive years on spring wheat (Triticum aestivum L. cv. K›rik) in Erzurum during the years 1990-1994. The herbicide efficacy against all broad-leaved weeds and against the most common weed species was determined by comparing the number of weeds in untreated and treated plots.

6p aquaman27 15-01-2019 26 1   Download

Carbon dioxide is produced in several anthropogenic activities at a rate of ca. 35 Gt/y. The main sources are: (1) the combustion of fossil carbon (production of electric energy, transport, heating, industry), (2) the utilization of biomass (combustion to obtain energy, fermentation), and (3) the decomposition of natural carbonates (mainly in the steel and cement industry).

87p xunu1311 02-11-2012 54 6   Download

Reactive liquid-liquid extraction of inorganic acids with amines and effect of solvating diluents; Liquid extraction of tall oil from wastewaters of paper industry • Supercritical fluid extraction of natural products; Enzymatic reactions in supercritical CO2; Solubilities of liquids and solids in dense CO2 with entrainer • Relation between the morphology and application properties of polymer catalysts and adsorbents • Study of the permeation and pervaporation of volatile organic substance (propan-1-ol, toluene) • Observation of the competitive adsorption on Vycor glass membrane App...

66p lulanphuong 22-03-2012 84 12   Download

Asedegbega-Nieto et al. Nanoscale Research Letters 2011, 6:353 http://www.nanoscalereslett.com/content/6/1/353 NANO EXPRESS Open Access Preparation and surface functionalization of MWCNTs: study of the composite materials produced by the interaction with an iron phthalocyanine complex Esther Asedegbega-Nieto1*, María Pérez-Cadenas1, Jonathan Carter2, James A Anderson2 and Antonio Guerrero-Ruiz1 Abstract Carbon nanotubes [CNTs] were synthesized by the catalytic vapor decomposition method.

4p dauphong13 09-02-2012 53 5   Download

Trong năm 1971, hai nhóm nghiên cứu độc lập phát hiện ra một hợp chất tự nhiên với một cấu trúc khác thường. Hỗn hợp này được xác định là bialaphos, một tripeptide có chứa một axit amin độc đáo, L-2-amino-4-hydroxy (methyl) phosphinyl] butyric (gọi là phosphinothricin hoặc PPT) liên quan đến hai L-alanyl moieties (Hình 9.1). Bayer et al.1 thu được hợp chất này từ viridochromogenes Streptomyces, trong khi Kondo et al.2 xác định nó trong nền văn hóa của Streptomyces hygroscopicus. Degradative1, 3 và synthetic1, 4 nghiên cứu cung cấp bằng chứng về cấu trúc. Các hình thức tự nhiên của PPT là...

19p bengoan369 15-12-2011 68 5   Download