Organotellurium chemistry: Remarkably facile preparation of benzo-1,3-tellurazoles
Benzo-1,3-tellurazoles carrying alkyl or aryl substituents in position 2 were prepared in a facile two-step sequence, starting with readily available 2-haloanilines. This approach relies on the preparation of bis(2-aminophenyl) ditellurides by nucleophilic halide displacement from 2-haloanilines with sodium telluride in N-methylpyrrolidone. Subsequent reductive cyclization with carboxylic acid halides or carboxylic anhydrides furnished benzo-1,3- tellurazoles in good yields.
McMullen, Nathan C.,Fronczek, Frank R.,Junk, Thomas
p. 120 - 124
(2013/04/10)
NITROGEN-TELLURIUM HETEROCYCLES. 2. APPROACHES TO THE SYNTHESIS OF 2-SUBSTITUTED BENZOTELLURAZOLES
Several 2-substituted benzotellurazoles have been prepared by the reaction of N-allyl derivatives of o-methyltelluroaniline with POCl3 or SOCl2 followed by reduction of the ?-telluranes which are formed.The use of the zinc and sodium salts of o-aminotellurophenol and 2-chlorotellurenylazobenzene, in a procedure similar to that used to prepare benzothiazoles and benzoselenazoles, did not lead to the formation of benzotellurazoles.
Sadekov, I. D.,Abakarov, G. M.,Shneider, A. A.,Kuren', S. G.,Starikov, A. G.,et al.
p. 103 - 108
(2007/10/02)
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