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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: myii on May 20, 2021, 07:20:53 AM

Title: hydrolysis of isopropenyl αlpha-D-glucopyranoside
Post by: myii on May 20, 2021, 07:20:53 AM
Hi

Does anyone know where I can find the hydrolysis of isopropenyl αlpha-D- glucopyranosides?

Really struggling to find the mechanism for it :(

Thanks :)
Title: Re: hydrolysis of isopropenyl αlpha-D-glucopyranoside
Post by: Babcock_Hall on May 20, 2021, 10:34:19 AM
Have you tried SciFinder?  Another way to approach this question is to think about the synthesis and apply the concept of microscopic reversibility.
Title: Re: hydrolysis of isopropenyl αlpha-D-glucopyranoside
Post by: rolnor on May 20, 2021, 01:18:30 PM
I am not sure about this structure, where is the isoprenyl attached?
Title: Re: hydrolysis of isopropenyl αlpha-D-glucopyranoside
Post by: myii on May 20, 2021, 02:06:51 PM
Have you tried SciFinder?  Another way to approach this question is to think about the synthesis and apply the concept of microscopic reversibility.

How can I find the mechanism on scifinder?
Title: Re: hydrolysis of isopropenyl αlpha-D-glucopyranoside
Post by: Babcock_Hall on May 20, 2021, 02:38:31 PM
I am not sure about this structure, where is the isoprenyl attached?
The OR group is on carbon-1.  In the Haworth representation of α-D-glucose and its glucosides, the OR group is on the opposite side of the ring, relative to the CH2OH group on carbon-5.  In the β-diastereomer, they are on the same side of the ring.  I think that it is the isopropenyl group, not the isoprenyl group, but Spell Checkers are like Forest Gump's box of chocolates; you never know what you are going to get.
Title: Re: hydrolysis of isopropenyl αlpha-D-glucopyranoside
Post by: OrganicH2O on May 20, 2021, 04:20:05 PM
The mechanism is going to depend slightly on the conditions. Is it a simple acid catalyzed hydrolysis? If yes, first you need to identify the functional group being hydrolyzed. Then, google or look up in a textbook the mechanism for that type of hydrolysis. A scifinder search might be unnecessary, and it might be hard to find such a basic mechanism in the literature when it is freely available in hundreds of textbooks.
Title: Re: hydrolysis of isopropenyl αlpha-D-glucopyranoside
Post by: Babcock_Hall on May 22, 2021, 11:19:11 AM
Have you tried SciFinder?  Another way to approach this question is to think about the synthesis and apply the concept of microscopic reversibility.

How can I find the mechanism on scifinder?
Rather than using SciFinder, it will be easier to look it up in your textbook.  Glycosides are a subclass of what class of molecules.  In other words what functional group is present at C-1?