This course is designed to provide an overview of "Green Chemistry", ie the development of processes and chemical techniques with low environmental impact, low-risk and high sustainability. The aspects emphasized in this course are those associated with organic synthesis and thus chemistry metrics, solvents, catalysis, renewable feedstocks and innovative techniques in particular applied to the synthesis of fine chemicals and pharmaceuticals, with a laboratory module. At the end of the course the student will be able to compare and evaluate the synthesis of organic compounds with a critical spirit and to develop and propose simple alternatives according to the criteria discussed in class.