Processes for large scale production of tetrapyrroles

摘要

Processes for the large scale production of tetrapyrrolic compounds useful as photosensitizers in photodynamic therapy, such as meso-formyl porphyrins, meso-acrylate porphyrins, purpurins and benzochlorins. In particular, tin ethyl etiopurpurin (SnET2) and the intermediates necessary for its production without chromatography are disclosed.