From: selcuk calimsiz (calimsiz$##$yahoo.com)
Date: Mon Feb 20 2006 - 19:01:41 EST
Dear Kamal,
You can use isoureas for esterification.
for the details please see
Kocienski's latest protecting group book.
Also a Review:
Mathias, L. J. Synthesis, 1979, 561-576.
For an application to synthesize a t-butyl ester;
please see; Lipton, et. al. Tet, 2001, 57, 6353.
Regards,
Selcuk Calimsiz
PhD candidate
Purdue University
Department of Chemistry
West Lafayette, IN
http://web.ics.purdue.edu/~calimsiz/
--- kmorendha <mailbox$##$prolificint.com> wrote:
> I'm making Esters of amino acids like, L-alanine
> methyl/t-butyl/benzyl ester but have process of
> making their Hydrochloride salts thro' amino acid,
> the alcohol & thionyl chloride & reflux.
>
> Thro' this, I'm getting their HCl salts. But I want
> only the respective esters NOT as their
> hydrochlorides. I can not do the amine liberation by
> making it alkaline with NaOH/NH3, etc.
>
> Can you suggest me making only the Aminoacid Esters
> thro' some process ?
>
>
>
> Thanks,
> Kamal
>
>
>
>
>
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