Re: ORGLIST:cellulosa acetate

Date view Thread view Subject view Author view Attachment view

From: Uno Maeorg (uno$##$chem.ut.ee)
Date: Wed May 14 2003 - 09:07:50 EDT

Hi Dian,

Have you think about using of nucleophilic catalysis with DMAP. People did
this type of acylation on cyclodextrins very successfully. Certainly
different positions have different reactivity and you have to wait to get
maximal acylation.

Uno Maeorg

On Tue, 13 May 2003, dian pratama wrote:

> I've been synthesis cellulosa acetate from sugar
> tree's cellulosa. But I've difficulties to calculated
> polimer degree and molecular weight of cellulosa that
> i isolated, because there is limited tools and reagent
> at my university.So i cant exactly how much reagent
> (iuse acetic acid glacial to activated and acetic
> anhydrid to acetilasi,and sulfuric acid) Do you have
> some suggest to me?
> I also want to use zinc cloride to catalisis acetilasi
> celulosa,Do you can give me suggest the procedure?
>
> __________________________________
> Do you Yahoo!?
> The New Yahoo! Search - Faster. Easier. Bingo.
> http://search.yahoo.com
> _______________________________________________
> ORGLIST - Organic Chemistry Mailing List
> Website / Archive / FAQ: http://www.orglist.net
> To post a message (TO EVERYBODY) send to everybody$##$orglist.net
> To unsubscribe, send to everybody-request$##$orglist.net the message: unsubscribe your_orglist_password your_address
> List coordinator: Joao Aires de Sousa (coordinator$##$orglist.net)
> 

-- 
Uno Maeorg                                         ! e-mail   : uno$##$chem.ut.ee
University of Tartu, Institute of Organic Chemistry! phone    : +(3727)375243
2 Jakobi St, Tartu 50090, Estonia                  ! fax      : +(3727)375243

_______________________________________________
ORGLIST - Organic Chemistry Mailing List
Website / Archive / FAQ: http://www.orglist.net
To post a message (TO EVERYBODY) send to everybody$##$orglist.net
To unsubscribe, send to everybody-request$##$orglist.net the message: unsubscribe your_orglist_password your_address
List coordinator: Joao Aires de Sousa (coordinator$##$orglist.net)
Date view Thread view Subject view Author view Attachment view

This archive was generated by hypermail 2.1.4 : Fri Sep 19 2003 - 12:17:25 EDT