Can u explain me this 2 acidcatalyzed and base catalyzed reaction ?

For hydroxamic acid H+ is used as catalyst.

Now you tell me in which step you are facing problem

As in both case substrate is different so we use catalyst accordingly

Thank you 😊 Simun

You are always welcome dear 😘

in which step do you have doubt?

sir why here 2 mechanism of the reaction

here we are use two media 1) acid and 2) base so in both the media reaction will be different

in the acid media reactant is H+ so it attracks on OH group

but sir in fast and second case the reactant are different na

yes if we are using ester of hydroxamic acid the we have to take base

if we are using hydroxamic acid the take acid

sir pls tell me which compounds will give this rearrangment

keto nitrene and keto carbene both gives rearrangement

both give same type of rearrangement like wolff rearrangement

I m fully confused about this Lossen rearrangement sir

okay the start from starting

what is your doubt. where are you confused??

spacificly which compounds give reaction then how it will react the mechanism ...all of this

sir can u explain me from starting ...

hydroxamic acid gives losses product in acidic medium. if we want to proceed this reaction in base media the we have to convert hydroxamic acid into hydroxamic ester

now hydroxamic acid also give lossen rearrangement in base media

hydroxamic ester give reaction in base medium na ?

yes yes

only hydroxamic acid and hydroxamic ester gives Lossen rearrangement na sir ?

sir pls send me simply in which cases Wolff rearangments take place

yee

wait..

ok sir

mainly in this case

check now, how simple this reaction is

yes sir now I got it

😊😊👍

tqqq sir 🙏🙏