7-oxabicyclo<2.2.1>hept-5-en-2-one dibenzyl acetal | 115140-08-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 7-oxabicyclo<2.2.1>hept-5-en-2-one dibenzyl acetal
• 英文别名: (1S,4S)-5,5-bis(phenylmethoxy)-7-oxabicyclo[2.2.1]hept-2-ene
• CAS: 115140-08-4；120235-07-6；126372-05-2；131722-80-0
• 化学式: C₂₀H₂₀O₃
• 分子量: 308.377
• InChiKey: BIRZIQHTVOXFTL-MOPGFXCFSA-N

物化性质

• 沸点：
  425.4±45.0 °C(Predicted)
• 密度：
  1.20±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.84
• 重原子数：
  23.0
• 可旋转键数：
  6.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  27.69
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  7-oxabicyclo<2.2.1>hept-5-en-2-one dibenzyl acetal 在 间氯过氧苯甲酸 作用下， 以 氯仿 为溶剂， 生成 (1RS,4RS,5RS,6RS)-2,2-bis(benzyloxy)-5,6-exo-epoxy-2,2-7-oxabicyclo<2.2.1>heptane
  参考文献：
  名称：

  8-氧杂双环[3.2.1]辛烷-2,3,4,6,7-戊醇的立体选择性合成和适合构建( 1→3)-C,C-连接三糖

  摘要：

  对映体纯 (+)-(1S4S,5S 6S)-6-endo-(benzyloxy)-5-exo-{[(tert-butyl)dimethylsilyl]oxy}-7-oxa-bicy clo[2.2.1]heptan- 2-one ((+)-5) 及其对映异构体 (-)-5，很容易通过 Diets-Alder 将呋喃添加到 1-氰基乙酸乙烯酯中获得。可以以高立体选择性转化为 8-oxabicyclo[3.2.1]octane-2,3.4.6,7-pentol 衍生物（参见方案 2 中的 23-28）。它们的前体，(1R,2S,4R,5S,6S,7R,8R)-7-endo-(benzyloxy)-8-exo-hydroxy-3,9-dioxatricycl o[4.2.1.0(2.4)]non -.5-endo-yl benzoate ((-)-19), 转化为 (1R,2R,5S, 6S,7R

  DOI：

  10.1002/1522-2675(20010613)84:6<1363::aid-hlca1363>3.0.co;2-m
• 作为产物：
  描述：

  (+/-)-7-oxabicyclo<2.2.1>hept-5-en-2-one 生成 7-oxabicyclo<2.2.1>hept-5-en-2-one dibenzyl acetal
  参考文献：
  名称：

  REYMOND, JEAN-LOUIS;VOGEL, PIERRE, TETRAHEDRON LETT., 30,(1989) N, C. 705-706

  摘要：

  DOI：

文献信息

• A highly stereoselective total synthesis of (±)castanospermine
  作者：Jean-Louis Reymond、Pierre Vogel

  DOI：10.1016/s0040-4039(01)80287-2

  日期：——

  An efficient synthesis of (±)castanospermine based on the bromine addition to 7-oxabicyclo[2.2.1]hept-5-en-2-one benzyl acetal is presented.

  提出了一种有效的合成方法，基于将溴加成7-氧杂双环[2.2.1]庚-5-烯-2-酮苄基缩醛，合成（±）castanospermine。
• Acid-Catalyzed Rearrangement of 3-Aza-8-oxatricyclo[3.2.1. 02,4]octan-6-one Acetals. Highly Stereoselective Total Synthesis of 3-Amino-3-deoxy-D-altrose and Derivatives
  作者：Cristina Nativi、Jean-Louis Reymond、Pierre Vogel

  DOI：10.1002/hlca.19890720504

  日期：1989.8.9

  amines ([3-endo-alkoxy-5-oxo-7-oxabicyclo[2.2.1]hept-2-exo-yl]carbamates 16, 20, 24, and 28 and 33). Using (+)-(1R, 4R)-5,5-bis(benzyloxy)7-oxabicyclo[2.2.1]hept-2-ene((+)-6) derived from furan and l-cyanovinyl (1S)-camphanate, the method was applied to prepare 2-O-benzyl-3-[(tert-butoxy)carbonyiamino]-5-O-(3-chlorobenzoyl)-3-deoxy-β-D-altrofuranurono-6,1-lactone ((−)-37). This compound was converted to

  将叠氮基甲酸乙酯和叠氮甲酸叔丁酯添加到7-氧杂双环[2.2.1]庚-5-烯-2-酮二甲基（5）和二苄基（6）乙缩醛中，得到区域异构的三唑啉混合物。后者得到相应的氮丙啶（6,6-二烷氧基-3-氮杂-8-氧杂三环[3.2.1.0 2,4 ]辛烷-3-羧酸15，19，23，和27和31上UV照射）。在质子酸存在下，氮丙啶被重新布置为保护的胺（[3-桥-烷氧基-5-氧代-7-氧杂双环[2.2.1]庚-2-外型-基]氨基甲酸酯16，20，24，和28岁和33）。使用衍生自呋喃和1-氰基乙烯基的（+）-（1 R，4 R）-5,5-双（苄氧基）7-氧杂双环[2.2.1]庚-2-烯（（+）- 6）（1 S）-樟脑酸酯，该方法用于制备2 - O-苄基-3-[（叔丁氧基）羰基氨基] -5 - O-（3-氯苯甲酰基）-3-脱氧-β-D-呋喃呋喃醛-6， 1-内酯（（-）- 37）。该化合物被转化为3-氨基-3-
• Application of new optically pure ketene equivalents derived from tartaric acids to the total, asymmetric syntheses of (+)-6-deoxycastanospermine and (+)-6-deoxy-6-fluorocastanospermine
  作者：Jean-Louis Reymond、Pierre Vogel

  DOI：10.1039/c39900001070

  日期：——

  5S, 7S)-3-ethyl-2-oxo-6, 8-dioxa-3-azabicyclo[3.2.1]octane-7-carboxylic acid (8) whose 1-cyanovinyl ester (10) added to furan to give, after two recrystallizations, an optically pure 7-oxabicyclo[2.2.1]hept-5-en-2-yl derivative (11) that was converted into (+)-6-deoxycastanospermine (+)-(2) and (+)-6-deoxy-6-fluorocastanospermine (+)-(3).

  二-O-乙酰基-（S，S）-酒石酸酐与二乙缩醛的缩合。N-乙基氨基乙醛得到（1 S，5 S，7 S）-3-乙基-2-氧代-6，8-二氧杂-3-氮杂双环[3.2.1]辛烷-7-羧酸（8），其1-氰基乙烯基将酯（10）添加到呋喃中，经过两次重结晶后，得到光学纯的7-氧杂双环[2.2.1]庚-5-烯-2-基衍生物（11），将其转变为（+）-6-脱氧castanospermine（ +）-（2）和（+）-6-脱氧-6-氟castanospermine（+）-（3）。
• Total, asymmetric synthesis of (+)-castanospermine, (+)-6-deoxycastanospermine, and (+)-6-deoxy-6-fluorocastanospermine
  作者：Jean Louis Reymond、A. Alan Pinkerton、Pierre Vogel

  DOI：10.1021/jo00006a031

  日期：1991.3

  Bromination of the dibenzyl acetal of (-)-(1S,4S)-7-oxabicyclo[2.2.1]hept-5-en-2-one ((-)-5) led to (+)-(1S,5S,6S,7S)-6-endo-(benzyloxy)-5-exo-bromo-7-oxabicyclo[2.2.1]heptan-2-one (25). Baeyer-Villiger oxidation of 25 gave 2-O-benzyl-3-bromo-3,5-dideoxy-beta-L-arabino-hexofuranosidurono-6,1-lactone (26). Methanolysis of 26 afforded the corresponding methyl (methyl alpha-beta-L-arabinofuranosid)uronates (27 + 28). The alpha anomer 27 was reduced with DIBAH into methyl 2-O-benzyl-3-bromo-3,5-dideoxy-beta-L-arabino-hexofuranoside (29). Mesylation of the primary alcohol, followed by treatment with NH3 gave methyl 2-O-benzyl-3,5-6-trideoxy-3,6-imino-beta-L-lyxo-hexofuranoside (32). Acetylation of the amine with ClCH2COCl, acetolysis of the methyl furanoside followed by Arbuzov condensation with (EtO)3P, and then intramolecular Horner-Emmons reaction led to (5S,6S,7S)-7-hydroxy-5-(benzyloxy)-1-azabicyclo[4.3.0]non-3-en-2-one (37). Base-catalyzed hydrolysis of the corresponding epoxide 43 ((1S,6S,7S,8R,8aS)-8-(benzyloxy)-6,7-epoxy-1-hydroxyoctahydroindolizidin-5-one) followed by reduction of the lactam and deprotection of the alcoholic functions afforded (+)-castanospermine ((+)-1). The conversion of (-)-5 into (+)-1 was highly stereoselective, requiring the isolation of 10 synthetic intermediates and with an overall yield of 15.2%. Reduction of 43 with BH3.Me2S or its treatment with HF.Et3N allowed one to prepare readily (+)-6-deoxycastanospermine ((+)-2 and 6-deoxy-6-fluorocastanospermine ((+)-3). The crystal structure of (+)-3 is also reported.
• REYMOND, JEAN-LOUIS;PINKERTON, A. ALAN;VOGEL, PIERRE, J. ORG. CHEM., 56,(1991) N, C. 2128-2135
  作者：REYMOND, JEAN-LOUIS、PINKERTON, A. ALAN、VOGEL, PIERRE

  DOI：——

  日期：——