From: Anand Pandey (anand.pandey$##$alembic.co.in)
Date: Sat Oct 28 2006 - 01:17:21 EDT
Hi.
I am trying to protect the 2,6-dimethyl-3 corboxyl-1,4-dihydropyridine,
nitrogen with so many protecting protecting group e.g. Boc and N-fromyl
group. but is all fasiled. Can any one suggest with a very good protecting
gp methodology which can be deprotected with mild condition.?
with warm regards.
ANAND
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Subject: Everybody Digest, Vol 26, Issue 15
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> 1. Re: double bond hydrogenation (hai zhang)
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> Message: 1
> Date: Thu, 26 Oct 2006 16:24:07 -0700 (PDT)
> From: hai zhang <haizhang67$##$yahoo.com>
> Subject: Re: ORGLIST: double bond hydrogenation
> To: Jeff Li <arnombas$##$yahoo.com.cn>, everybody$##$orglist.net
> Message-ID: <20061026232407.24418.qmail$##$web90501.mail.mud.yahoo.com>
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> Yes,
>
> It is highly possible because tetrasubstituted double bond is much more
difficult to be reduced. The pressure of hydrogen and the load of Pd
catalyst could play the trick.
>
> Good luck!
> www.ecompound.com
>
> Jeff Li <arnombas$##$yahoo.com.cn> wrote:
> hi folks:
>
> Is it possible to selectively hydrogenate a di-substituted alkenyl part
over a tetrasubstituted alkenyl part in a same molecule (or a same macrolide
ring), using palladium catalyst, like Pd-C?
>
> Thanks!!
>
>
>
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