Natural Science Forum / Chemistry / Organic Synthesis / April 2005

in literature i found quite interesting procedure for reducing
carboxylic acids without touching ester moiety. in typical procedure
the suspension of sodium borohydride in thf is treated with acid. then
the solution of iodine in thf is added dropwise. some authors observed

I would like to make a quat.  A very simple one.  No particular funciton or
direction... Just a quat.  How can I make one with a limited lab?

 Can anybody pls tell me the exact procedure for the formation of dimethyl acetal.

  I have a TMS or TBDMS ether, and I want to convert it directly to
aldehyde, as free alcohol immidiately makes lactone with methyl ester
in my molecule to give lactone and I want aldehyde.
  One more thing is that I have carboxy cyclopropane ring in my

I am a Chemistry student and I am looking for an efficient method to
fractionate mixtures containig fatty acids, hydroxifatty acids,
longchain dicarboxilic acids  and long chain aliphatic alcohols
thanks for sugestions

Can you please help me with the following reaction. Is this the right
product?
I cannot find C12H12P2O4 in the chemical abstracts. How do i name this
compound?

Could anyone give a good suggestion about the selective reduction of
nitro group. My compound also contains an aldehyde group. I tried
Fe/AcOH, it doesn't work well. Thanks

   I want to deprotect the cyclic acetal in my compound , having two
esters and also the carboxy cyclopropane ring , which rearranges in
presence of acid.I want to avoid that .
     Please tell me the convinient method for deprotection of