| Abstract
| - A simple synthetic route for converting chlorophyll(Chl)-ato bacteriochlorophyll(BChl)-c is described. Methyl bacteriopheophorbide(MBPhe)-d, easily obtained from Chl-a, wasselectively brominated at the 20-position with pyridiniumtribromide, and the following Suzuki-coupling with methylboronic acid afforded ca. a 4:1 mixture of desired MBPhe-c(20-Me) and debrominated MBPhe-d (20-H) in quantitativeyield. Separation of MBPhe-c, transesterification of the 17-propionate group (Me → farnesyl), and magnesium insertionsuccessfully led to naturally occurring BChl-c.
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