Chemistry of pyrrocorphins: synthesis of isobacteriochlorins and pyrrocorphins bearing a methyl group at the meso position between rings A and D
作者:Kurt Hilpert、Christian Leumann、Anthony P. Davis、Albert Eschenmoser
DOI:10.1039/c39830001401
日期:——
A sigmatropic methyl shift from the angular position C-1 in ring A to the mesoposition C-20 betweenrings A and D constitutes the crucial step in syntheses leading to a 20-methyl-isobacteriochlorin and to 20-methyl-pyrrocorphins which served as substrates in the investigation presented in the accompanying communication.