[PDF] Top 20 D-Mannitol in Organic Synthesis.
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D-Mannitol in Organic Synthesis.
... de partida (Esquema 13). A estratégia sintética de Quinn baseou-se na síntese convergente entre os fragmentos sintons 22 e 23, tendo como etapa chave a reação de metátese de olefinas para obtenção do intermediário 30. A ... See full document
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Synthesis of Epoxone from D-fructose: a didactic experiment for organic chemistry laboratory courses focusing on green chemistry principles.
... FROM D -FRUCTOSE. A DIDACTIC EXPERIMENT FOR ORGANIC CHEMISTRY LABORATORY COURSES FOCUSING ON GREEN CHEMISTRY ...PRINCIPLES. In recent years, the introduction of the Green Chemistry concepts in ... See full document
4
Total Synthesis of Altissimacoumarin D, a Small Molecule Sirtuin1 Activator
... acid in the absence of extraneous acid or base catalysis has the benefit of being environmentally green as it is conducted in water without organic ...7 in 90% yield under acid catalysis, we ... See full document
5
The use of microwave ovens in solid-phase organic synthesis.
... 9225; Sanseverino, A. M.; Quim. Nova 2002, 25, 660.; Barbosa, A. C. R. N.; Cruz, C. V. M. S.; Graziani, M. B.; Lorenzetti, M. C. F.; Sabadini, E.; Quim. Nova 2001, 24, 901; Pecoraro, E.; Davolos, M. R.; Jafelicci Jr., ... See full document
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[3+4]Cycloadditions via oxyallyl cations: applications in organic synthesis.
... rápido e a precipitação de NaBr é observada quando se utiliza acetonitrila como solvente. A próxima etapa envolve a remo- ção redutiva de um átomo de iodo pelo iodeto, formando iodo molecular, o qual é capturado pelo ... See full document
12
Organogels: a new system for lipases immobilization and its application in organic synthesis.
... As enzimas utilizadas neste trabalho foram: lipase de Pseudo- monas sp (Genzyme Biochemicals Ltd), com atividade específica de 1900 unidades/mg de sólido; lipase de Candida cilindracea (CCL) (Sigma Chemical CO) tipo ... See full document
9
Studies on the Synthesis of Vitamin D Analogs with Aromatic D-Ring
... regulator. Organic extracts were dried over anhydrous Na 2 SO 4 , filtered and concentrated using rotary evaporator at aspirator pressure (20−30 ...immersion in a solution containing either a mixture of ... See full document
8
Recent advances in the preparation of aziridines and their application in organic synthesis.
... construção de moléculas quirais (Método B, Esquema 1). Uma vari- ação elegante deste último método consiste na inserção de carbenos, metalo-carbenóides ou carbânions a iminas (Método C, Esquema 1), também envolvendo ... See full document
10
Isocyanuric chloride acid and cyanuric chloride: general aspects and applications in organic synthesis.
... 50. De Luca, L.; Giacomelli, G.; Porchedu, A.; J. Org. Chem. 2002, 67, 5152. 54. Penning, T. D.; Talley, J. J.; Bertenshaw, S. R.; Carter, J. S.; Collins, P. W.; Docter, S.; Graneto, M. J.; Lee, L. F.; Malecha, J. ... See full document
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a-diazo carbonyl compounds: an atractive estrategy in organic synthesis.
... Porter e colaboradores descobriram que na reação do diazomalonato de etila com tiofeno (137) não se formava um ciclopropano. Ao invés disto, formava-se o ilídeo 138 no qual a reação ocorreu com o átomo de enxofre do anel ... See full document
14
Photochemical Transformations of Tetrazole Derivatives: Applications in Organic Synthesis
... 10a-d in acidic media leads to 9H-pyrimido[4,5-b]indoles 14a-d in good to excellent yields (84–95%) ( Scheme 2) ...equilibration in acid media to the azide tautomer and its subsequent ... See full document
18
Synthesis of chirals regioisomers from D-mannitol: obtainment of a acetylenic alcohols mixture.
... FROM D-MANNITOL: OBTAINMENT OF A ACETYLENIC ALCOHOLS ...The synthesis of chiral acetylenic regioisomers was described by using an appropriate intermediate such as isopropylidene glycerol, a synthon ... See full document
5
Synthesis of aminoalcohols from D-mannitol.
... FROM D-MANNITOL. Aminoalcohols have found important applications in synthetic and medicinal chemistry, being used as chiral building blocks for the synthesis of many biologically active ... See full document
5
J. Braz. Chem. Soc. vol.23 número1
... maxima in solution (Table 1), the dyes in the solid state present blue shifted bands (3a: 459 nm, 3b: 508 nm, 3c: 491 nm and 3d: 536 nm), indicating that the studied solvents can better stabilize the keto ... See full document
15
J. Braz. Chem. Soc. vol.12 número4
... the synthesis and characterization of novel organic-inorganic hybrid materials between the crystalline antimonic acid (CAA) and two conductive polymers: polypyrrole and ...by in situ oxidative ... See full document
6
ANTHROPOGENIC EFFECTS ON SOIL MICROMYCETES
... fungi, in this respect, can affect, up to a certain limit, their biodegradation, converting them into less toxic or often energetically important nutrient sources (Stojanovic et ...accumulation in the soil ... See full document
9
Mat. Res. vol.5 número3
... Titanium-aluminophosphate samples were synthesized hydrothermally under autogenous pressure, with xTiO 2 :(1-x/2)Al 2 O 3 :P 2 O 5 :TEA:100H 2 O:6xHF as molar com- position of the synthesis reaction mixture, where ... See full document
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Hydrophobic immobilization of Burkholderia cepacia lipase onto octyl-silica for synthesis of flavors esters / Imobilização hidrofóbica da lipase de Burkholderia cepacia sobre octil-sílica para síntese de ésteres de sabores
... 2017). In this context, the use of biocatalysts is a good choice by an industry aiming for an environmentally friendly and green process (ANGAJALA; PAVAN; SUBASHINI, ...conditions, in addition to their ... See full document
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From Medicinal Chemistry to Human Health: Current Approaches to Drug Discovery for Cancer and Neglected Tropical Diseases
... activity. In addition, these compounds could induce cell apoptosis on a level similar to that of colchicine (65% of apoptotic cells after 24 ...h). In short, this medicinal chemistry strategy was able to ... See full document
17
Synthesis and esterification reactions of isobutylene: an undergratuate organic chemistry experiment.
... a in- corporar a noção de que substâncias orgânicas gasosas não são mui- to utilizadas em síntese orgânica, a não ser como combustíveis no bico de ...orgânica in- dustrial, onde vários gases orgânicos são ... See full document
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