Synthesis of homologously pure bacteriochlorophyll-e and f analogues from BChls-c/d via transformation of the 7-methyl to formyl group and self-aggregation of synthetic zinc methyl bacteriopheophorbides-c/d/e/f in non-polar organic solvent
✍ Scribed by Hitoshi Tamiaki; Miki Omoda; Yoshitaka Saga; Hidetada Morishita
- Book ID
- 104205338
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- French
- Weight
- 510 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0040-4020
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✦ Synopsis
Homologously pure methyl bacteriopheophorbides-e and f (BPhes-e/f M ) were prepared from modification of naturally occurring bacteriochlorophylls-c and d (BChls-c/d), respectively, by transformation of the methyl to formyl group at the 7-position. The absolute configuration of the 1-hydroxyethyl group at the 3-position of (Zn-)BPhes-e/f M was determined from comparison with structurally known BChl-c/d epimers. Visible spectra of synthetic (Zn-)BPhe-c/d/e/f M showed that the 7 1 -oxidation and the 8 2 /12 1 /20-methylation affected Soret, Q x and Q y bands of both the monomeric (in a polar organic solvent) and oligomeric species (in a non-polar solvent).