Greener shades of blue: Green chemistry as an opportunity to improve the approach to the synthesis of phthalocyanines

Green chemistry has emerged as a powerful tool to rationally design environmentally sustainable chemical processes by choosing safe chemicals and minimizing the production of waste. This article focuses on the opportunity, yet underexplored, to evaluate the green syntheses of phthalocyanines by means of metrics such as the E-factor and EcoScale, in a view to better assess their sustainability and provide insights on their viability with respect to standard procedures.