Re: ORGLIST: Isocyanate purification

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From: Maringanti Krishna (maringanti9$##$yahoo.com)
Date: Mon Apr 04 2005 - 02:12:12 EDT


Hi!
 
Can anyone suggest a good alternative for

TFFH (Fluoro-N,N,Ní,Ní-tetramethylformamidinium hexafluorophosphate, 97%
CAS Number: 164298-23-1) in amide coupling?
 
No! EDC/HOBt or HOAt or HATU or pentafluorophenol or mixed anhydride methods dont work in either dichloromethane or THF or in DMF either at rt/reflux/microwave irradiation conditions.
Thanks in advance
Krishna

                
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