2009
DOI: 10.1590/s0100-40422009000900042
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Abstract: Recebido em 2/4/09; aceito em 26/5/09; publicado na web em 20/10/09Despite the availability of alternative methods for drying tetrahydrofuran (THF), the use of the still apparatus, wherein a THF solution containing Na-bezophenone ketyl is heated to reflux, remains widespread. We herein propose a set of procedures to solve the problems usually faced in applying this drying technique. Moreover, a discussion is made on the chemical knowledge underlying such procedures. Safety and economy issues concerned with the… Show more

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Cited by 20 publications
(16 citation statements)
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“…General Information: All organic reagents and solvents were purchased from commercial suppliers (Sigma‐Aldrich, Alfa Aesar, and others) and were used as received. THF was purified according to a previously reported procedure . Radicals 1a ,[11d] 1b , 1c and acetylene‐substituted nitronyl nitroxide radicals 2e and 2f were obtained according to previously reported procedures.…”
Section: Methodsmentioning
confidence: 99%
“…General Information: All organic reagents and solvents were purchased from commercial suppliers (Sigma‐Aldrich, Alfa Aesar, and others) and were used as received. THF was purified according to a previously reported procedure . Radicals 1a ,[11d] 1b , 1c and acetylene‐substituted nitronyl nitroxide radicals 2e and 2f were obtained according to previously reported procedures.…”
Section: Methodsmentioning
confidence: 99%
“…All organic reagents and solvents were purchased from commercial suppliers (Sigma–Aldrich, Alfa Aesar, and others) and used as received. THF was purified from BHT and peroxides according to the reported procedure . 4‐Iodophenyldiazonium tosylate and benzenediazonium tosylate were obtained by the previously described procedure .…”
Section: Methodsmentioning
confidence: 99%
“…CH 2 Cl 2 was dried from CaH 2 , and THF was dried according to a literature procedure [44]. Melting points are uncorrected and were determined on a Thomas Hoover apparatus.…”
Section: Methodsmentioning
confidence: 99%