Thank you!!! Vandana Good topic for discuss, ya you can use autoclave for synthesis but its depend on what you want! in the case of Phyto chemicals (Active Ingredients) you have take care for this steps.
1) Nature of Phyto chemicals.
2)Stability of Phyto chemicals at autoclaves condition. i mean you check from keep that phyto chemical in this this condition and study its degradation data and from that you will get a idea for the synthesis. more information i will upload in short time.
Some nanoparticles when synthesized in green way do require high temperature to come into the required form.once synthesized it remains stable for considerable period of time.