2,3,4-tri-O-benzoyl-α-L-rhamnopyranosyl-(1-> 2)-3,4-di-O-benzoyl-α-L-rhamnopyranosyl trichloroacetimidate | 666845-78-9

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 2,3,4-tri-O-benzoyl-α-L-rhamnopyranosyl-(1-> 2)-3,4-di-O-benzoyl-α-L-rhamnopyranosyl trichloroacetimidate
• 英文别名: Bz(-2)[Bz(-3)][Bz(-4)]Rha(a1-2)[Bz(-3)][Bz(-4)]Rha(a)-O-C(NH)CCl3；[(2S,3S,4R,5R,6S)-4-benzoyloxy-2-methyl-5-[(2S,3R,4R,5S,6S)-3,4,5-tribenzoyloxy-6-methyloxan-2-yl]oxy-6-(2,2,2-trichloroethanimidoyl)oxyoxan-3-yl] benzoate
• CAS: 666845-78-9
• 化学式: C₄₉H₄₂Cl₃NO₁₄
• 分子量: 975.23
• InChiKey: KRTXBFBILJRKJA-ZARZRICTSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  10.5
• 重原子数：
  67
• 可旋转键数：
  19
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  192
• 氢给体数：
  1
• 氢受体数：
  15

反应信息

• 作为反应物：
  描述：

  2,3,4-tri-O-benzoyl-α-L-rhamnopyranosyl-(1-> 2)-3,4-di-O-benzoyl-α-L-rhamnopyranosyl trichloroacetimidate 在 palladium dichloride 三氟甲磺酸三甲基硅酯 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 5.0h， 生成
  参考文献：
  名称：

  A concise synthesis of two isomeric pentasaccharides, the O repeat units from the lipopolysaccharides of P. syringae pv. porri NCPPB 3364T and NCPPB 3365

  摘要：

  A concise synthesis of two isomeric pentasaccharides, alpha-L-Rhap-(1-->2)-alpha-L-Rhap-(1-->3)-alpha-L-Rhap-(1-->3)-[beta-D-GlcpNAc-(1--> 2)]-alpha-L-Rhap (A) and alpha-L-Rhap-(1-->2)-alpha-L-Rhap-(1-->3)-[beta-D-GlcpNAc-(1-->2)]-alpha-L-Rhap-(1-->3)-alpha-L-Rhap (B), the O repeats from the lipopolysaccharides of Pseudonomonas syringae pv. porri NCPPB 3364(T) and 3365 was achieved via assembly of the building blocks, allyl 3,4-di-O-benzoyl-alpha-L-rhamnopyranoside (1), 2,3,4-tri-O-benzoyl-alpha-L-rhamnopyranosyl trichloroacetimidate (2), allyl 4-O-benzoyl-3-O-chloroacetyl-alpha-L-rhamnopyranoside (6), 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl trichloroacetimidate (7), and allyl 2,4-di-O-benzoyl-alpha-L-rhamnopyranoside (10). Coupling of 1 with 2 followed by deallylation and trichloroacetimidate formation gave the disaccharide donor 5, while condensation of 6 with 7, followed by dechloroacetylation, offered the disaccharide acceptor 9. Then, 5 was coupled with 10 to obtain the trisaccharide 11, and subsequent deallylation and trichloroacetimidate formation furnished the trisaccharide donor 13. Coupling of 9 with 13, followed by deprotection, afforded pentasaccharide 19, while condensation of 9 with 5, followed by deallylation and trichloroacetimidate formation, gave the tetrasaccharide donor 16, whose coupling with 10 and subsequent deprotection yielded another pentasaccharide 22. (C) 2003 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.carres.2003.09.014
• 作为产物：
  描述：

  2,3,4-tri-O-benzoyl-α-L-rhamnopyranosyltrichloroacetimidate 在 palladium dichloride 三氟甲磺酸三甲基硅酯 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 8.0h， 生成 2,3,4-tri-O-benzoyl-α-L-rhamnopyranosyl-(1-> 2)-3,4-di-O-benzoyl-α-L-rhamnopyranosyl trichloroacetimidate
  参考文献：
  名称：

  A concise synthesis of two isomeric pentasaccharides, the O repeat units from the lipopolysaccharides of P. syringae pv. porri NCPPB 3364T and NCPPB 3365

  摘要：

  A concise synthesis of two isomeric pentasaccharides, alpha-L-Rhap-(1-->2)-alpha-L-Rhap-(1-->3)-alpha-L-Rhap-(1-->3)-[beta-D-GlcpNAc-(1--> 2)]-alpha-L-Rhap (A) and alpha-L-Rhap-(1-->2)-alpha-L-Rhap-(1-->3)-[beta-D-GlcpNAc-(1-->2)]-alpha-L-Rhap-(1-->3)-alpha-L-Rhap (B), the O repeats from the lipopolysaccharides of Pseudonomonas syringae pv. porri NCPPB 3364(T) and 3365 was achieved via assembly of the building blocks, allyl 3,4-di-O-benzoyl-alpha-L-rhamnopyranoside (1), 2,3,4-tri-O-benzoyl-alpha-L-rhamnopyranosyl trichloroacetimidate (2), allyl 4-O-benzoyl-3-O-chloroacetyl-alpha-L-rhamnopyranoside (6), 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl trichloroacetimidate (7), and allyl 2,4-di-O-benzoyl-alpha-L-rhamnopyranoside (10). Coupling of 1 with 2 followed by deallylation and trichloroacetimidate formation gave the disaccharide donor 5, while condensation of 6 with 7, followed by dechloroacetylation, offered the disaccharide acceptor 9. Then, 5 was coupled with 10 to obtain the trisaccharide 11, and subsequent deallylation and trichloroacetimidate formation furnished the trisaccharide donor 13. Coupling of 9 with 13, followed by deprotection, afforded pentasaccharide 19, while condensation of 9 with 5, followed by deallylation and trichloroacetimidate formation, gave the tetrasaccharide donor 16, whose coupling with 10 and subsequent deprotection yielded another pentasaccharide 22. (C) 2003 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.carres.2003.09.014

文献信息

• A concise synthesis of two isomeric pentasaccharides, the O repeat units from the lipopolysaccharides of P. syringae pv. porri NCPPB 3364T and NCPPB 3365
  作者：Zuchao Ma、Jianjun Zhang、Fanzuo Kong

  DOI：10.1016/j.carres.2003.09.014

  日期：2004.1

  A concise synthesis of two isomeric pentasaccharides, alpha-L-Rhap-(1-->2)-alpha-L-Rhap-(1-->3)-alpha-L-Rhap-(1-->3)-[beta-D-GlcpNAc-(1--> 2)]-alpha-L-Rhap (A) and alpha-L-Rhap-(1-->2)-alpha-L-Rhap-(1-->3)-[beta-D-GlcpNAc-(1-->2)]-alpha-L-Rhap-(1-->3)-alpha-L-Rhap (B), the O repeats from the lipopolysaccharides of Pseudonomonas syringae pv. porri NCPPB 3364(T) and 3365 was achieved via assembly of the building blocks, allyl 3,4-di-O-benzoyl-alpha-L-rhamnopyranoside (1), 2,3,4-tri-O-benzoyl-alpha-L-rhamnopyranosyl trichloroacetimidate (2), allyl 4-O-benzoyl-3-O-chloroacetyl-alpha-L-rhamnopyranoside (6), 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl trichloroacetimidate (7), and allyl 2,4-di-O-benzoyl-alpha-L-rhamnopyranoside (10). Coupling of 1 with 2 followed by deallylation and trichloroacetimidate formation gave the disaccharide donor 5, while condensation of 6 with 7, followed by dechloroacetylation, offered the disaccharide acceptor 9. Then, 5 was coupled with 10 to obtain the trisaccharide 11, and subsequent deallylation and trichloroacetimidate formation furnished the trisaccharide donor 13. Coupling of 9 with 13, followed by deprotection, afforded pentasaccharide 19, while condensation of 9 with 5, followed by deallylation and trichloroacetimidate formation, gave the tetrasaccharide donor 16, whose coupling with 10 and subsequent deprotection yielded another pentasaccharide 22. (C) 2003 Elsevier Ltd. All rights reserved.