An improved synthesis is developed for the crystalline isobacteriochlorin 5 which carries a 20-methyl group. X-Ray analysis shows that the molecule 5 is substantially puckered in contrast to a close relative lacking the 20-methyl group which is planar.
C. L. Gibson, M. J. Doyle, P. R. Raithby and A. R. Battersby, J. Chem. Soc., Perkin Trans. 1, 1994, 1893 DOI: 10.1039/P19940001893
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