21. Industrially, succinic anhydride is prepared by catalytic hydrogenation of maleic anhydride. 22. Industrially, succinic anhydride is prepared by catalytic hydrogenation of maleic anhydride . 23. Common dehydrating agents include phosphorus pentoxide, anhydrides , or zinc chloride. 24. This diene reacts rapidly with electrophilic alkenes, such as maleic anhydride . 25. It is incompatible with strong acids, acid chlorides and acid anhydrides . 26. Varying DA was obtained using acetic anhydride or alkaline hydrolysis. 27. Upon treatment with phthalic anhydride derivatives, the diamine converts to phthaloperinones. 28. It can be synthesized from pyrogallol using zinc chloride and acetic anhydride . 29. Why is it not mentioned in the article acid anhydride ? 30. An interesting case I think, is when acetic anhydride gets protonated.
