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Publikováno v:
Synthetic Communications. 49:1277-1285
A series of substituted 2-amino-1,3-thiazines were synthesized as amides (9a-9i), carbamates (9j-9m), sulfonamides (9n-9o) and urea derivatives (9p-9q) by treating the compound 7 with acid chloride...
Publikováno v:
Synthetic Communications. 48:2773-2781
A facile method for the sulfenyletherification of unsaturated alcohols using dimethyl sulfoxide/oxalyl chloride has been described in this article. Methanesulfenyl chloride is supposed to b...
Publikováno v:
Synthetic Communications. 48:2708-2714
A simple and selective copper(II) chloride-mediated monochlorination of anilines and nitrogen-containing heterocycles has been developed. Stirring a mixture of aniline, copper(II) chloride, lithium chloride in EtOH under reflux condition produced 4-c
Autor:
Saad R. Atta-Allah, Rasha S. Gouhar, Ahmed S. A. Youssef, Kamal A. Kandeel, Wael S. I. Abou-Elmagd, Magdy M. Hemdan, David S. A. Haneen
Publikováno v:
Synthetic Communications. 47:299-309
6-Aminopyrazolo[1,2-a][1,2,4]triazine-4,8-dione derivative 3 was obtained upon the reaction of the acid hydrazide derivative 2a with ethyl cyanoacetate. The reactions of 3 with several electrophiles such as aldehydes, isatin, acetic anhydride, phenyl
Publikováno v:
Synthetic Communications. 46:1619-1624
Phenols are easily converted to the corresponding aryl chlorides by using phosphorus pentachloride (PCl5) and a catalytic amount of phenylphosphonic dichloride (PhPOCl2), which is a new efficient method for synthesis of aryl chloride in good yields.
Publikováno v:
Synthetic Communications. 46:977-982
Not only α,β-dehydroamino acids are important constituents for a number of bioactive peptides in nature, but also they are important building blocks for a variety of synthetic amino acids in organic synthesis. Methods to prepare dehydroamino acids
Publikováno v:
Synthetic Communications. 46:893-901
An efficient pathway for the synthesis of the aminobenzophenone derivatives via Friedel–Crafts benzoylation using copper triflate as catalyst is proposed. New derivatives are synthesized. The copper triflate could be easily recovered and reused wit
Autor:
Isabella Bruno, Adriano Mollica, Cristina Maccallini, Rosa Amoroso, Marialuigia Fantacuzzi, Maria Luisa Tricca, Barbara De Filippis, Letizia Giampietro, Alessandra Ammazzalorso, Mauro Di Matteo
Publikováno v:
Synthetic Communications. 45:2546-2554
The direct acylation of sulfonamides by esters represents an attractive strategy in organic chemistry, being an interesting alternative to classical approaches to N-acylsulfonamides. Here is described a simple and effective method to obtain N-acylsul
Publikováno v:
Synthetic Communications. 45:1023-1030
Bismuth chloride was used to catalyze the [2 + 3] cycloaddition between sodium azide with aryl nitriles, aliphatic nitriles, and vinyl nitriles. A number of 5-substituted 1H-tetrazoles were synthesized in water or isopropanol/water mixtures using mic
Autor:
Rolf Carlson, Alexandre Descomps
Publikováno v:
Synthetic Communications. 44:757-761
The unstable ketones 1-bromo-3-buten-2-one, 1-bromo-3-butyn-2-one, and 1,3-dibromo-3-buten-2-one can be obtained from the corresponding acetals in high yields by treating the acetals with anhydrous iron (III) chloride suspended on dry silica. A simpl