7-tert-butoxycarbonyl-5,6-exo-dihydroxy-5,6-O-isopropylidene-2-(4-toluenesulfonyl)-7-azabicyclo[2.2.1]hept-2-ene

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 7-tert-butoxycarbonyl-5,6-exo-dihydroxy-5,6-O-isopropylidene-2-(4-toluenesulfonyl)-7-azabicyclo[2.2.1]hept-2-ene
• 英文别名: tert-butyl (1R,2R,6S,7R)-4,4-dimethyl-8-(4-methylphenyl)sulfonyl-3,5-dioxa-10-azatricyclo[5.2.1.02,6]dec-8-ene-10-carboxylate
• 化学式: C₂₁H₂₇NO₆S
• 分子量: 421.514
• InChiKey: XLXIAGAUZPEPOS-SPUZQDLCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  29
• 可旋转键数：
  4
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  90.5
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  7-tert-butoxycarbonyl-5,6-exo-dihydroxy-5,6-O-isopropylidene-2-(4-toluenesulfonyl)-7-azabicyclo[2.2.1]hept-2-ene 在 disodium hydrogenphosphate 、 四氧化锇 、 sodium amalgam 、 碳酸氢钠 、 N-甲基吗啉氧化物 作用下， 以 四氢呋喃 、 甲醇 、 叔丁醇 为溶剂， 反应 48.0h， 生成 7-tert-butoxycarbonyl-2,3-O-isopropylidene-2,3,5,6-exo-tetrahydroxy-7-azabicyclo[2.2.1]heptane
  参考文献：
  名称：

  On the electronic effects of OH groups. Synthesis and investigation of tetrahydroxylated azabicycloheptanes

  摘要：

  合成了两种立体异构体2,3,5,6-四羟基氮杂双环[2.2.1]庚烷并测定了它们的碱强度。 2,3,5,6-外型异构体 1 和 2,3-外型-5,6-内型异构体 2 由 Boc-吡咯和甲苯磺酰乙炔的 Diels-Alder 加合物通过锇催化二羟基化反应制备而成和保护、甲苯磺酰基还原和重复二羟基化。脱保护得到1，而2是通过将二醇转化为二三氟甲磺酸酯，然后用KNO 2 亲核反转并脱保护得到的。尝试通过类似的策略合成2,3,5,6-内异构体，但失败了。 1和2的pKa分别确定为7.0和6.4。这意味着在[2.2.1]-氮杂双环系统中由于OH的立体异构而导致的碱基强度的变化比在哌啶中更小。这是通过两个系统中电荷-偶极子相互作用的差异来解释的。

  DOI：

  10.1039/b419154d
• 作为产物：
  描述：

  1-吡咯甲酸叔丁酯 在 四氧化锇 、 碳酸氢钠 、 对甲苯磺酸 、 N-甲基吗啉氧化物 作用下， 以 丙酮 、 叔丁醇 为溶剂， 反应 48.0h， 生成 7-tert-butoxycarbonyl-5,6-exo-dihydroxy-5,6-O-isopropylidene-2-(4-toluenesulfonyl)-7-azabicyclo[2.2.1]hept-2-ene
  参考文献：
  名称：

  On the electronic effects of OH groups. Synthesis and investigation of tetrahydroxylated azabicycloheptanes

  摘要：

  合成了两种立体异构体2,3,5,6-四羟基氮杂双环[2.2.1]庚烷并测定了它们的碱强度。 2,3,5,6-外型异构体 1 和 2,3-外型-5,6-内型异构体 2 由 Boc-吡咯和甲苯磺酰乙炔的 Diels-Alder 加合物通过锇催化二羟基化反应制备而成和保护、甲苯磺酰基还原和重复二羟基化。脱保护得到1，而2是通过将二醇转化为二三氟甲磺酸酯，然后用KNO 2 亲核反转并脱保护得到的。尝试通过类似的策略合成2,3,5,6-内异构体，但失败了。 1和2的pKa分别确定为7.0和6.4。这意味着在[2.2.1]-氮杂双环系统中由于OH的立体异构而导致的碱基强度的变化比在哌啶中更小。这是通过两个系统中电荷-偶极子相互作用的差异来解释的。

  DOI：

  10.1039/b419154d

文献信息

• Synthesis of (±)-conduramines from pyrrole
  作者：Regis Leung-Toung、Yanzhou Liu、Joseph M. Muchowski、Yu-Lin Wu

  DOI：10.1016/0040-4039(94)88307-6

  日期：1994.3

  The Diels-Alder product 1b, of tosylacetylene and N-tert-Boc-pyrrole, was converted into (±)-conduramine C-1 (22) and the tetraacetates of (±)-conduramine A-1 (9b) and F-1 (15b).

  甲苯磺酰基乙炔和N-叔-Boc-吡咯的Diels-Alder产物1b被转化为（±）-conduramine C-1（22）和（±）-conduramine A-1（9b）和F- 1（15b）。
• Organolithium-induced enantioselective alkylative double ring-opening of epoxides: synthesis of enantioenriched unsaturated amino alcohols
  作者：David M. Hodgson、Christopher R. Maxwell、Timothy J. Miles、Edyta Paruch、Ian R. Matthews、Jason Witherington

  DOI：10.1016/j.tet.2004.02.055

  日期：2004.4

  The use of (-)-sparteine as an external chiral ligand in enantioselective organolithium-induced alkylative double ring-opening of dihydropyrrole epoxides and 7-azanorbornene-type epoxides gives unsaturated acyclic amino alcohols, and amino cyclohexenols in up to 87% ee. (C) 2004 Elsevier Ltd. All rights reserved.
• Synthesis of Conduramines from <i>N</i>-<i>tert</i>-Butoxycarbonylpyrrole
  作者：Regis Leung-Toung、Yanzhou Liu、Joseph M. Muchowski、Yu-Lin Wu

  DOI：10.1021/jo971907r

  日期：1998.5.1

  Two related synthetic strategies were devised to convert the Diels-Alder adduct 3c of Boc-pyrrole and p-toluenesulfonylacetylene into various racemic and optically pure conduramines. One process consists of the regio-and stereoselective hydroxylation of 3c to the tri-and dihydroxylated azabicyclo[2.2.1]heptane derivatives 10b (Scheme 2) and the exo-endo mixture 13-14 (Scheme 3). Anionic fragmentation of 10b (methylmagnesium bromide) and of the 13-14 sulfone mixture (lithium bis(trimethylsilyl)amide) generated the corresponding tri-and dihydroxylated aminocyclohexenes 17 and 16 (Scheme 3). Compound 17 is an aminocyclitol with a stereochemistry and partial aminotriol sequence identical to that found in neoinosamine. Compound 16 served as a source of the protected and fi ee aminodiols 35b, and 35a (Scheme 6), which were stereospecifically epoxidized to 36 (Scheme 6) and 40 (Scheme 7). Phenylselenide cleavage of these epoxides provided 37 (Scheme 6) and 41a (Scheme 7), which after selenoxide cycloelimination and protecting group manipulation were converted into (+/-)-conduramine C-l (39a, Scheme 6) and the previously unreported, all-cis-conduramine D-l (43a, Scheme 7). In a second process, anionic fragmentaion of the bicyclic system is effected prior to introduction of the hydroxyl groups, as exemplified by the high-yielding conversion of the exo-endo mixture of azabicycloheptenes 11 and 12 into the aminocyclohexadiene 15 (Scheme 3). Osmate catalyzed cis-dihydroxylation of the derived bis-Boc derivative 20 (Scheme 4) Zed stereospecifically to the alpha-cis-diol 21 which was transformed into (+/-)-conduramine A-1 (27a) and its tetraacetyl derivative 27b via the epoxy compound 24. On the other hand, peracid oxidation of the diene 15 gave the beta-epoxide 28 (Scheme 5) which was cleaved to the trans-diol 29 with aqueous sulfuric acid. This diol was converted into (+/-)-conduramine F-1(34a) and its tetraacetyl derivative (34b) by a reaction sequence similar to that used for the other conduramine syntheses. Fractional crystallization of the diastereomeric mixture of Michael adducts obtained from (+/-)-3c and (-)methyl lactate gave (-)-44a and (-)-45a both in greater than or equal to 47% yield (Scheme 8). Both the carboxylic acid (+)-44b and the primary alcohol (+)-46 derived from (-)-44a were converted into (-)-3c with excess methylmagnesium bromide (ca. 40% overall yield). In the same way (-)-45a was transformed into optically pure (+)-3c. (-)-3c and (+)-3c were then converted into (-)-conduramine C-l [(-)-39a] and (+)-conduramine D-l [(+)-43a] by procedures identical to those used for the racemic compounds.