Results 51 to 60 of about 597,655 (179)

Reação de substituição nucleofílica aromática em 1,2-dicloro-4,5-dinitrobenzeno [PDF]

, 2006
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciencias Fisicas e Matematicas. Programa de Pós-Graduação em QuímicaO 1,2-dicloro-4,5-dinitrobenzeno (DCDNB) reage com aminas primárias e secundárias, em acetonitrila, em ...
Menezes, Fabrício Gava
core  

4-(4-(2-Bromoethyl)phenoxy)-2,3,5,6-tetrafluoropyridine

Molbank, 2023
The title compound was synthesized in near quantitative yields via initial nucleophilic aromatic substitution of pentafluoropyridine (PFP) with 4-(2-bromoethyl)phenol as a versatile precursor for ionic liquids (ILs).
Tiffany H. Li, Lucas C. Messer, Nathan J. Weeks, Timothy J. Fuhrer, Scott T. Iacono   +4 more
doaj   +1 more source

UM MÉTODO EFICIENTE PARA A OBTENÇÃO DE DERIVADOS DE 1-ALQUILAMINO-2,4-DINITROBENZENO E A REDUÇÃO REGIOSSELETIVA PARA A OBTENÇÃO DE DERIVADOS DE 1-ALQUILAMINO-2-AMINO-4-NITROBENZENO

Química Nova, 2016
Both primary and secondary amines react with 2,4-dinitrochlorobenzene to give derivatives of 1-alkylamino-2,4-dinitrobenzene. These compounds are important intermediates for the synthesis of a diverse range of products.
Cíntia de A. Custódio, Simon J. Garden
doaj   +1 more source

A Novel and Efficient Synthesis of New Dixanthones [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2000
The facile and high yield synthesis of a new series of dibenzophenones in the presence of polyphosphoric acid (PPA) together with their cyclization to corresponding moni and dixanthones are described.
Hashem Sharghi, Fatemeh Tamaddon, Hossein Eshghi   +2 more
doaj  

C(aryl)-O Bond Formation from Aryl Methanesulfonates via Consecutive Deprotection and SNAr Reactions with Aryl Halides in an Ionic Liquid

Molecules, 2007
An efficient K3PO4-mediated synthesis of unsymmetrical diaryl ethers using the ionic liquid [Bmim]BF4 (1-butyl-3-methylimidazolium tetrafluoroborate) as solvent has been developed.
Hui Xu, Yang Chen
doaj   +1 more source

Synthesis of Novel Fluorescent Sensors Based on Naphthalimide Fluorophores for the Highly Selective Hg2+-Sensing

Journal of Chemistry, 2015
With an aim to develop the new sensors for optical detection of Hg2+ ions, two novel fluorometric sensors were designed and successfully prepared using 2-(3-(2-aminoethylsulfanyl)propylsulfanyl)ethanamine and one or two N-methylnaphthalimide moieties (1 ...
Yordkhuan Tachapermpon, Pornthip Piyanuch, Narupon Prapawattanapol, Kanjarat Sukrat, Kullatat Suwatpipat, Nantanit Wanichacheva   +5 more
doaj   +1 more source

Base-Promoted S_NAr Reactions of Fluoro- and Chloroarenes as a Route to N-Aryl Indoles and Carbazoles

Molecules, 2019
KOH/DMSO-promoted C-N bond formation via nucleophilic aromatic substitution (SNAr) between chloroarenes or fluoroarenes with indoles and carbazole under transition metal-free conditions affording the corresponding N-arylated indoles and carbazoles has ...
Muhammad Asif Iqbal, Hina Mehmood, Jiaying Lv, Ruimao Hua   +3 more
doaj   +1 more source

Nucleophilic Aromatic Substitution Reactions of Novel 5-(2-Methoxyphenyl)tetrazole Derivatives with Organolithium Reagents

, 2016
Nucleophilic Aromatic Substitution Reactions of Novel 5-(2-Methoxyphenyl)tetrazole Derivatives with Organolithium ...
Aaron E. Bunnell (3042465), S. Russell Stabler (3048654), Derek P. G. Norman (2947464), Lee A. Flippin (506350)   +3 more
core   +2 more sources

NGHIÊN CỨU TỔNG HỢP DẪN XUẤT QUINOLINECARBOXAMIDE VÀ THỬ NGHIỆM HOẠT TÍNH SINH HỌC

Tạp chí Khoa học Đại học Cần Thơ, 2014
Trong nghiên cứu này, hai dẫn xuất quinolinecarboxamide là N-(2-(7-chloro-quinolin-4-ylamino)ethyl)acetamide (5) và N-(2-(7-chloroquinolin-4-ylamino)ethyl)benz-amide (8) đã được tổng hợp thành công từ tác chất ban đầu là 4,7-dichloroquinoline.
Trần Thị Thùy Dương, Nguyễn Hoàng Sơn, Bùi Thị Bửu Huê   +2 more
doaj  

Syntheses of fluorooxindole and 2-fluoro-2-arylacetic acid derivatives from diethyl 2-fluoromalonate ester

Beilstein Journal of Organic Chemistry, 2014
Diethyl 2-fluoromalonate ester is utilised as a building block for the synthesis of 2-fluoro-2-arylacetic acid and fluorooxindole derivatives by a strategy involving nucleophilic aromatic substitution reactions with ortho-fluoronitrobenzene substrates ...
Antal Harsanyi, Graham Sandford, Dmitri S. Yufit, Judith A.K. Howard   +3 more
doaj   +1 more source