6-epi-D-Purpurosamine

A. Golfbiowski, U. Jacobsson, and J. Jurczak, High-pressure approach to the total synthesis of 6-epi-D-purpurosamine B, Tetrahedron 43 3063 (1987). 

T. Suami, Y. Honda, T. Kato, M. Masu, and K. Matsuzawa, Synthesis of methyl 2,6-di-A-acetyl-2,3,4,6,7-pentadeoxy-L-iyxo-heptopyranoside derivative of 6-epi-D-purpurosamine B, Bull. Chem. Soc. Jpn. 53 1372 (1980). 

The D-erythro-azide (195) and its C-2 isomer were present in the resulting equilibrium mixture in the ratio of 3 2. Methyl di-N-acetyl-a-purpurosaminide C (197) has been synthesized from methyl 2,3,4,6-tetra-O-methanesulphonyl-a-D-galacto-pyranoside by the sequence of reactions outlined in Scheme 38. A related series of reactions was used to obtain the epi-purpurosamine C derivative (198) from methyl 2,3,4,6-tetra-O-methanesulphonyl-a-D-glucopyranoside. 

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