Anhydrous n n dimethylformamide

Example 3

General information: ¹H NMR spectra were recorded on a Bruker Avance III600 instrument, in deuterated solvents and were referenced to TMS (6 scale). Flash chromatography was performed on Merck silica gel 60 (0.040-0.063 mm). Analytical thin layer chromatography (TLC) was carried out on precoated (0.25 mm) Merck silica gel F-254 plates. Mass spectra were recorded with a LTQ Orbitrap Discovery instrument, possessing an Ionmax ionization source. 3-Acetoxyindole, 5-bromoindole, 6-chloroindole, 5-cyanoindole, methyl indole-5-carboxylate, methyl indole-6-carboxylate, 5-methylindole, iodine, potassium iodide, thiophenol, oxalyl chloride, anhydrous aluminum chloride, hydroxylamine hydrochloride, anhydrous pyridine, triethylamine, 1,2-dibromoethane, piperazine and morpholine were purchased from Sigma-Aldrich. Anhydrous dichloromethane and anhydrous N,N-dimethylformamide were purchased from Acros organics.

Example 2

2-Bromotoluene was purchased from Oakwood Products. Urea, bromoethane, 2-bromopropane, tetrabutylammonium hexafluorophosphate, tris(4-bromophenyl)aminium hexachloroantimonate, anhydrous toluene, and anhydrous p-dioxane were purchased from Sigma Aldrich. Phenothiazine, sodium hydride (60% dispersion in mineral oil), bis(dibenzylideneacetone)palladium(0), sodium tert-butoxide, sulfur, iodine, o-dichlorobenzene (ODCB), anhydrous dichloromethane (DCM), anhydrous tetrahydrofuran, anhydrous N,N-dimethylformamide (DMF), and magnesium sulfate were obtained from Acros Organics. Tri-tert-butylphosphonium tetrafluoroborate was obtained from Oxchem. Silica gel and neutral alumina used for column chromatography were purchased from Silicycle and Sorbent Technologies, respectively. Ethyl acetate, hexanes, and diethyl ether were purchased from VWR. Solvents used for NMR spectroscopy were obtained from Cambridge Isotope Laboratories.