Beilstein J. Org. Chem.2006,2, No. 3, doi:10.1186/1860-5397-2-3
alternative. [1][2] The main parameters and approaches are briefly discussed as follows.
Atomeconomy [3][4]
This parameter is the ratio of the molecular weight of the target molecule to the sum total of the molecular weights of all the substances produced in the stoichiometric equation for the reaction
involved. It takes into account the amount of the reagents incorporated into the end product. Cycloadditions are examples of transformations with 100% atomeconomy. For other reactions (e.g. substitution reaction), a 100 % economy can never be reached due to the intrinsic nature of the reaction. The main
use of this parameter is to adapt reaction sequences in a way that transformations with low atomeconomy are limited to a minimum.
Environmental factor (E-factor) [5][6][7][8]
This factor is the ratio of the weight of generated waste to the total weight of the end product. It is a useful tool for
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Graphical Abstract
Scheme 1:
Reduction of nitrobenzene to aniline [23]