Processes for large scale production of tetrapyrroles
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United States of America Patent
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Oct 8, 2002
Grant Date -
Sep 26, 2002
app pub date -
Jan 23, 2001
filing date -
Jan 23, 2001
priority date (Note) -
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Abstract
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.
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