具有β-(1→6)-半乳吡喃糖骨架和α-L-(1→3)-阿拉伯呋喃糖侧链的阿拉伯半乳寡糖的简易合成

4-Methoxyphenyl glycoside of β-D-Galp-(1→6)-[α-L-Araf-(1→3)-]β-D-Galp-(1→6)-β-D-Galp-(1→6)-{β-D-Galp-(1→6)-[α-L-Araf-(1→3)-]β-D-Galp-(1→6)-β-D-Galp-(1→6)-}2β-D-Galp-(1→6)-[α-L-Araf-(1→)3)-]β-D-Galp-(1→)6)-β-D-Galp was synthesized with 2,3,4,6-tetra-O-benzoyl-α-D-galactopyranosyl trichloroacetimidate (1), 6-O-acetyl-2,3,4-tri-O-benzoyl-α-D-galactopyranosyl trichloroacetimidate (11), 4-methoxyphenyl 3-O-allyl-2,4-tri-O-benzoyl-β-D-galactopyranoside (2),isopropyl 3-O-allyl-2,4-tri-O-benzoyl--thio-β-D-galactopyranoside (12),4-methoxyphenyl 2,3,4-tri-O-benzoyl-β-D-galactopyranoside (5), and 2,3,5-tri-O-benzoyl-α-L-arabinofuranosyl trichloroacetimidate (8) as the key synthons.

Concise Syntheses of Arabinogalactans with β‐(1→6)‐Linked Galactopyranosyl Backbone and α‐(1→3)‐Linked Arabinofuranosyl Side Chains

4‐Methoxyphenyl glycoside of β‐D‐Galp‐(1→6)‐[α‐L‐Araf‐(1→3)‐] β‐D‐Galp‐(1→6)‐β‐D‐Galp‐(1→6)‐{β‐D‐Galp‐(1→6)‐[α‐L‐Araf‐(1→3)‐]β‐D‐Galp‐(1→6)‐β‐D‐Galp‐(1→6)‐}₂β‐D‐Galp‐(1→6)‐[α‐L‐Araf‐(1→3)‐]β‐D‐Galp‐(1→6)‐β‐D‐Galp was synthesized with 2, 3, 4, 6‐tetra‐O‐benzoyl‐α‐D‐galactopyranosyl trichloroacetimidate ( 1 ), 6‐O‐acetyl‐2, 3, 4‐tri‐O‐benzoyl‐α‐D‐galactopyranosyl trichloroacetimidate ( 11 ), 4‐methoxyphenyl 3‐O‐allyl‐2, 4‐di‐O‐benzoyl‐β‐D‐galactopyranoside ( 2 ), isopropyl 3‐O‐allyl‐2, 4‐di‐O‐benzoyl‐1‐thio‐β‐D‐galactopyranoside ( 12 ), 4‐methoxyphenyl 2, 3, 4‐tri‐O‐benzoyl‐β‐D‐galactopyranoside ( 5 ), and 2, 3, 5‐tri‐O‐benzoyl‐α‐L‐arabinofuranosyl trichloroacetimidate ( 8 ) as the key synthons.