📒 This book contain brief note of azetidin-2-one based pyrazoline like acetyl pyrazoline, benzoyl pyrazoline, phenyl sulfonyl pyrazoline derivatives and cyno-pyridine from Chalcones. it is helpful for those researcher who works on pyrazoline derivatives, this book is also helpful for young researcher as well as PhD students. schiff base and azetidin-2-one prepared from different aromatic aldehydes and then convert into Chalcones. pyrazoline is made from chalcones.