4-Thiopyranoside and 4-thiofuranoside derivatives of d-galactosamine
摘要:
Methyl 2-benzamido-2-deoxy-4-thio-alpha-D-galactopyranoside (7) was prepared in different ways starting from methyl 2-benzamido-3,6-di-O-benzoyl-2-deoxy-alpha-D-glucopyranoside (1). A 4,6-epidithiogalactopyranoside was obtained from the 4-O-mesyl derivative of 1. The transformations of 7 into 2-benzamido-2-deoxy-4-thio-D-galactofuran and into the corresponding methyl alpha- and beta-4-thio-D-galactofuranosides are reported. The T-2(3) conformation is proposed for the alpha anomers of the prepared furanoid compounds. (C) 1998 Elsevier Science Ltd.
4-Thiopyranoside and 4-thiofuranoside derivatives of d-galactosamine
摘要:
Methyl 2-benzamido-2-deoxy-4-thio-alpha-D-galactopyranoside (7) was prepared in different ways starting from methyl 2-benzamido-3,6-di-O-benzoyl-2-deoxy-alpha-D-glucopyranoside (1). A 4,6-epidithiogalactopyranoside was obtained from the 4-O-mesyl derivative of 1. The transformations of 7 into 2-benzamido-2-deoxy-4-thio-D-galactofuran and into the corresponding methyl alpha- and beta-4-thio-D-galactofuranosides are reported. The T-2(3) conformation is proposed for the alpha anomers of the prepared furanoid compounds. (C) 1998 Elsevier Science Ltd.