J. Yan, M. Zhu, Z. Zhou
SHORT COMMUNICATION
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Experimental Section
Melting points were determined on a digital melting point appara-
tus and were not corrected. IR spectra were recorded on a FT-170
SX instrument, 1H NMR spectra were measured on a Bruker
AM-400 FT-NMR spectrometer, and mass spectra were deter-
mined on an HP5989A mass spectrometer. Microwave reactions
were carried out with a single-mode cavity Sanle WHL70S-01 Mi-
crowave Synthesizer (Nanjing Sanle Microwave Equipment Corpo-
ration). Iodonium salts were prepared by the literature pro-
cedures,[8–10] as were iodanes.[11–16] Sodium tetraphenylborate is
commercially available.
General Procedure for Reactions between Sodium Tetraphenylborate
and Iodonium Salts or Iodanes: Sodium tetraphenylborate (1,
513 mg, 1.5 mmol), iodonium salt 2 or iodane 4 (0.75 mmol), and
water (5 mL) were placed in a 50 mL flask fitted with a condenser.
The vessel was placed in the center of the microwave synthesizer
and was then exposed to microwave irradiation (250 W) to heat it
at reflux for 1–5 min at 100 °C. After irradiation, the reaction mix-
ture was allowed to cool to room temperature and extracted with
diethyl ether (3×20 mL). The organic layer was dried with anhy-
drous MgSO4 and the solvents were removed in vacuo. The crude
product was separated on a silica gel plate with hexane as eluent
and the pure product 3 was afforded in good yields.
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Acknowledgments
Financial support from the Natural Science Foundation of China,
Zhejiang Province (Project Y404016) and the Education Founda-
tion of China, Zhejiang Province (Project 20040569) is greatly ap-
preciated.
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Received: November 23, 2005
Published Online: March 16, 2006
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Eur. J. Org. Chem. 2006, 2060–2062