methyl 2,7-di-O-benzyl-4,6-O-benzylidene-D-glycero-β-D-manno-heptopyranosyl-(1->3)-2,7-di-O-benzyl-4-O-(2-cyanophenyl)acetyl-6-deoxy-glycero-β-D-manno-heptopyranosyl-(1->4)-2,3-O-isopropylidene-α-L-rhamnopyranoside | 902751-36-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 2,7-di-O-benzyl-4,6-O-benzylidene-D-glycero-β-D-manno-heptopyranosyl-(1->3)-2,7-di-O-benzyl-4-O-(2-cyanophenyl)acetyl-6-deoxy-glycero-β-D-manno-heptopyranosyl-(1->4)-2,3-O-isopropylidene-α-L-rhamnopyranoside
• 英文别名: [(2R,3R,4S,5S,6S)-4-[[(2R,4R,4aR,6S,7S,8S,8aS)-8-hydroxy-2-phenyl-7-phenylmethoxy-4-(phenylmethoxymethyl)-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-6-yl]oxy]-6-[[(3aR,4R,6S,7S,7aR)-4-methoxy-2,2,6-trimethyl-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-7-yl]oxy]-5-phenylmethoxy-2-(2-phenylmethoxyethyl)oxan-3-yl] 2-(2-cyanophenyl)acetate
• CAS: 902751-36-4
• 化学式: C₆₈H₇₅NO₁₇
• 分子量: 1178.34
• InChiKey: IZTGWPCYBSBBRO-KNHBRYCSSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.9
• 重原子数：
  86
• 可旋转键数：
  25
• 环数：
  11.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  200
• 氢给体数：
  1
• 氢受体数：
  18

反应信息

• 作为反应物：
  描述：

  methyl 2,7-di-O-benzyl-4,6-O-benzylidene-D-glycero-β-D-manno-heptopyranosyl-(1->3)-2,7-di-O-benzyl-4-O-(2-cyanophenyl)acetyl-6-deoxy-glycero-β-D-manno-heptopyranosyl-(1->4)-2,3-O-isopropylidene-α-L-rhamnopyranoside 、 phenyl 4-O-benzyl-2,3-O-isopropylidene-1-thio-α-L-rhamnopyranoside 在 1-(苯基亚硫酰基)哌啶 、 三氟甲磺酸酐 、 2,4,6-三叔丁基嘧啶 作用下， 以 二氯甲烷 为溶剂， 反应 5.33h， 以73%的产率得到[(2R,3R,4S,5S,6S)-4-[[(2R,4R,4aR,6S,7S,8S,8aR)-8-[[(3aR,4S,6S,7S,7aR)-2,2,6-trimethyl-7-phenylmethoxy-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-4-yl]oxy]-2-phenyl-7-phenylmethoxy-4-(phenylmethoxymethyl)-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-6-yl]oxy]-6-[[(3aR,4R,6S,7S,7aR)-4-methoxy-2,2,6-trimethyl-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-7-yl]oxy]-5-phenylmethoxy-2-(2-phenylmethoxyethyl)oxan-3-yl] 2-(2-cyanophenyl)acetate
  参考文献：
  名称：

  Stereocontrolled Synthesis of the d- and l-glycero-β-d-manno-Heptopyranosides and Their 6-Deoxy Analogues. Synthesis of Methyl α-l-Rhamno-pyranosyl-(1→3)-d-glycero-β-d-manno-heptopyranosyl- (1→3)-6-deoxy-glycero-β-d-manno-heptopyranosyl-(1→4)-α-l- rhamno-pyranoside, a Tetrasaccharide Subunit of the Lipopolysaccharide from Plesimonas shigelloides

  摘要：

  The synthesis of D-and L-glycero-alpha-manno-thioheptopyranosides, protected with 4,6-O-alkylidenetype acetals is described. In glycosylations carried out with preactivation with the 1-benzenesulfinylpiperidine/trifluoromethanesulfonic anhydride couple, both the D-and L-glycero series exhibit excellent, beta-selectivity with a range of glycosyl acceptors. In contrast, a 4,7-O-alkylidene acetal was found not to afford, beta-selectivity. With a 4,6-O-[1-cyano-2-(2-iodophenyl) ethylidene] acetal protected thioglycoside, excellent, beta-selectivity was obtained in glycosylation reactions, and subsequent treatment with tributyltin hydride and azoisobutyronitrile brought about clean fragmentation to the 6-deoxy-glycero-beta-D-manno-heptopyranosides. This chemistry was applied to the stereocontrolled synthesis of methyl alpha-L-rhamno-pyranosyl-(1 -> 3)-D-glycero-beta- D-manno-heptopyranosyl-(1 -> 3)-6-deoxy-glycero-beta-D-manno-heptopyranosyl-(1 -> 4)-alpha-L-rhamno-pyranoside, a component of the lipopolysaccharide from Plesimonas shigelloides.

  DOI：

  10.1021/ja061594u
• 作为产物：
  描述：

  methyl 2,7-di-O-benzyl-4,6-O-{1-cyano-2-(2-iodophenyl)ethylidene}-3-O-(2-naphthalenylmethyl)-D-glycero-β-D-manno-heptopyranosyl-(1->4)-2,3-O-isopropylidene-α-L-rhamnopyranoside 在 1-(苯基亚硫酰基)哌啶 、 偶氮二异丁腈 、 三氟甲磺酸酐 、 三正丁基氢锡 、 2,4,6-三叔丁基嘧啶 作用下， 以 二氯甲烷 、 xylene 为溶剂， 反应 7.33h， 生成 methyl 2,7-di-O-benzyl-4,6-O-benzylidene-D-glycero-β-D-manno-heptopyranosyl-(1->3)-2,7-di-O-benzyl-4-O-(2-cyanophenyl)acetyl-6-deoxy-glycero-β-D-manno-heptopyranosyl-(1->4)-2,3-O-isopropylidene-α-L-rhamnopyranoside
  参考文献：
  名称：

  Stereocontrolled Synthesis of the d- and l-glycero-β-d-manno-Heptopyranosides and Their 6-Deoxy Analogues. Synthesis of Methyl α-l-Rhamno-pyranosyl-(1→3)-d-glycero-β-d-manno-heptopyranosyl- (1→3)-6-deoxy-glycero-β-d-manno-heptopyranosyl-(1→4)-α-l- rhamno-pyranoside, a Tetrasaccharide Subunit of the Lipopolysaccharide from Plesimonas shigelloides

  摘要：

  The synthesis of D-and L-glycero-alpha-manno-thioheptopyranosides, protected with 4,6-O-alkylidenetype acetals is described. In glycosylations carried out with preactivation with the 1-benzenesulfinylpiperidine/trifluoromethanesulfonic anhydride couple, both the D-and L-glycero series exhibit excellent, beta-selectivity with a range of glycosyl acceptors. In contrast, a 4,7-O-alkylidene acetal was found not to afford, beta-selectivity. With a 4,6-O-[1-cyano-2-(2-iodophenyl) ethylidene] acetal protected thioglycoside, excellent, beta-selectivity was obtained in glycosylation reactions, and subsequent treatment with tributyltin hydride and azoisobutyronitrile brought about clean fragmentation to the 6-deoxy-glycero-beta-D-manno-heptopyranosides. This chemistry was applied to the stereocontrolled synthesis of methyl alpha-L-rhamno-pyranosyl-(1 -> 3)-D-glycero-beta- D-manno-heptopyranosyl-(1 -> 3)-6-deoxy-glycero-beta-D-manno-heptopyranosyl-(1 -> 4)-alpha-L-rhamno-pyranoside, a component of the lipopolysaccharide from Plesimonas shigelloides.

  DOI：

  10.1021/ja061594u

文献信息

• Stereocontrolled Synthesis of the <scp>d</scp>- and <scp>l</scp>-<i>glycero</i>-β-<scp>d</scp>-<i>manno</i>-Heptopyranosides and Their 6-Deoxy Analogues. Synthesis of Methyl α-<scp>l</scp>-<i>Rhamno</i>-pyranosyl-(1→3)-<scp>d</scp>-<i>glycero</i>-β-<scp>d</scp>-<i>manno</i>-heptopyranosyl- (1→3)-6-deoxy-<i>glycero</i>-β-<scp>d</scp>-<i>manno</i>-heptopyranosyl-(1→4)-α-<scp>l</scp>- <i>rhamno</i>-pyranoside, a Tetrasaccharide Subunit of the Lipopolysaccharide from <i>Plesimonas shigelloides</i>
  作者：David Crich、Abhisek Banerjee

  DOI：10.1021/ja061594u

  日期：2006.6.1

  The synthesis of D-and L-glycero-alpha-manno-thioheptopyranosides, protected with 4,6-O-alkylidenetype acetals is described. In glycosylations carried out with preactivation with the 1-benzenesulfinylpiperidine/trifluoromethanesulfonic anhydride couple, both the D-and L-glycero series exhibit excellent, beta-selectivity with a range of glycosyl acceptors. In contrast, a 4,7-O-alkylidene acetal was found not to afford, beta-selectivity. With a 4,6-O-[1-cyano-2-(2-iodophenyl) ethylidene] acetal protected thioglycoside, excellent, beta-selectivity was obtained in glycosylation reactions, and subsequent treatment with tributyltin hydride and azoisobutyronitrile brought about clean fragmentation to the 6-deoxy-glycero-beta-D-manno-heptopyranosides. This chemistry was applied to the stereocontrolled synthesis of methyl alpha-L-rhamno-pyranosyl-(1 -> 3)-D-glycero-beta- D-manno-heptopyranosyl-(1 -> 3)-6-deoxy-glycero-beta-D-manno-heptopyranosyl-(1 -> 4)-alpha-L-rhamno-pyranoside, a component of the lipopolysaccharide from Plesimonas shigelloides.