3,4-O-Isopropylidene-L-arabinuronic acid 2,5-lactone | 151930-65-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 3,4-O-Isopropylidene-L-arabinuronic acid 2,5-lactone
• 英文别名: (3aR,6R,6aR)-2,2-dimethyl-4-oxo-6,6a-dihydro-3aH-furo[3,4-d][1,3]dioxole-6-carbaldehyde
• CAS: 151930-65-3
• 化学式: C₈H₁₀O₅
• 分子量: 186.164
• InChiKey: QKGJPKFKBNXJLP-KVQBGUIXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.2
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  61.8
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  3,4-O-Isopropylidene-L-arabinuronic acid 2,5-lactone 在 吡啶 、 盐酸 、 sodium cyanoborohydride 作用下， 以 甲醇 、 氯仿 为溶剂， 反应 10.0h， 生成 2,3-O-Isopropylidene-5-O-(p-tolylsulfonyl)-L-lyxono-1,4-lactone
  参考文献：
  名称：

  First synthesis of aldopentono-1,4-thiolactones

  摘要：

  A convenient synthesis of enantiomerically pure aldopentono-1,4-thiolactones is described. Thus, 4-thio-D-ribono-1,4-lactone (12) has been prepared from D-gluono-1,4-lactone (1), via its 2,3-O-isopropylidene derivative 3. The 5,6-glycol system of 3 was oxidized with NaIO4. Chemoselective reduction of the resulting aldehyde function with NaBH3CN led to 2,3-O-isopropylidene-L-lyxono-1,4-lactone (7). Tosylation of 7 and subsequent treatment of the tosylate 8 with sodium methoxide afforded methyl 4,5-epoxy-2,3-O-isopropylidene-L-lyxonate (9) as a key intermediate. Treatment of 9 with thiourea gave the 4,5-thiirane derivative having the D-ribo configuration (10). Regioselective opening of the thiirane ring and simultaneous thiolactonization took place by heating 10 with KOAc-HOAc-DMF. The resulting 5-O-acetyl-2,3-0-isopropylidene-4-thio-D-ribono-1,4-lactone (11) was readily converted, by acid removal (2 % HCI) of the protecting groups, into the crystalline thiolactone 12. A similar approach was employed for the synthesis of 4-thio-L-lyxono-1,4-lactone (19), starting from D-ribono-1,4-lactone (13).

  DOI：

  10.1021/jo00079a034
• 作为产物：
  描述：

  2,3-O-isopropylidene-D-gulonolactone 在 sodium periodate 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 2.1h， 生成 3,4-O-Isopropylidene-L-arabinuronic acid 2,5-lactone
  参考文献：
  名称：

  (-)-Lycoricidine、(+)-Lycoricidine 和 (+)-Narciclasine 通过取代乙烯基自由基与肟醚的 6-外环化全合成†

  摘要：

  描述了标题生物碱全合成方法的开发。该方法利用乙烯基自由基的立体选择性 6-exo 自由基环化为 O-苄肟自由基受体基团作为关键的战略要素。乙烯基自由基本身是通过苯基硫基自由基与双取代炔烃的区域选择性加成而产生的。讨论了这种添加的区域化学问题，这些问题导致三正丁基甲锡基自由基和苯硫基自由基产生不同的结果。描述的第一个此类合成，即 (-)-lycoricidine 的合成，分 14 个步骤进行，10 个步骤的总产率为 11%，用于开发所需的自由基化学。第二代合成，这次是天然（+）对映异构体，是利用从第一项研究中收集到的见解开发的，并证明效率更高，分九步提供目标生物碱，总产率为 44%。这种方法随后被用于要求更高的 (+)-narciclasine。出现的几个问题...

  DOI：

  10.1021/ja9826688

文献信息

• Total Syntheses of (−)-Lycoricidine, (+)-Lycoricidine, and (+)-Narciclasine via 6-<i>exo</i> Cyclizations of Substituted Vinyl Radicals with Oxime Ethers
  作者：Gary E. Keck、Travis T. Wager、J. Felix Duarte Rodriquez

  DOI：10.1021/ja9826688

  日期：1999.6.1

  The development of an approach to the total synthesis of the title alkaloids is described. The approach utilizes as the key strategic element a stereoselective 6-exo radical cyclization of a vinyl radical to an O-benzyloxime radical acceptor group. The vinyl radical was itself generated by regioselective addition of phenylthiyl radical to a disubstituted alkyne. The regiochemical issues of such additions

  描述了标题生物碱全合成方法的开发。该方法利用乙烯基自由基的立体选择性 6-exo 自由基环化为 O-苄肟自由基受体基团作为关键的战略要素。乙烯基自由基本身是通过苯基硫基自由基与双取代炔烃的区域选择性加成而产生的。讨论了这种添加的区域化学问题，这些问题导致三正丁基甲锡基自由基和苯硫基自由基产生不同的结果。描述的第一个此类合成，即 (-)-lycoricidine 的合成，分 14 个步骤进行，10 个步骤的总产率为 11%，用于开发所需的自由基化学。第二代合成，这次是天然（+）对映异构体，是利用从第一项研究中收集到的见解开发的，并证明效率更高，分九步提供目标生物碱，总产率为 44%。这种方法随后被用于要求更高的 (+)-narciclasine。出现的几个问题...
• First synthesis of aldopentono-1,4-thiolactones
  作者：Oscar Varela、Patricia A. Zunszain

  DOI：10.1021/jo00079a034

  日期：1993.12

  A convenient synthesis of enantiomerically pure aldopentono-1,4-thiolactones is described. Thus, 4-thio-D-ribono-1,4-lactone (12) has been prepared from D-gluono-1,4-lactone (1), via its 2,3-O-isopropylidene derivative 3. The 5,6-glycol system of 3 was oxidized with NaIO4. Chemoselective reduction of the resulting aldehyde function with NaBH3CN led to 2,3-O-isopropylidene-L-lyxono-1,4-lactone (7). Tosylation of 7 and subsequent treatment of the tosylate 8 with sodium methoxide afforded methyl 4,5-epoxy-2,3-O-isopropylidene-L-lyxonate (9) as a key intermediate. Treatment of 9 with thiourea gave the 4,5-thiirane derivative having the D-ribo configuration (10). Regioselective opening of the thiirane ring and simultaneous thiolactonization took place by heating 10 with KOAc-HOAc-DMF. The resulting 5-O-acetyl-2,3-0-isopropylidene-4-thio-D-ribono-1,4-lactone (11) was readily converted, by acid removal (2 % HCI) of the protecting groups, into the crystalline thiolactone 12. A similar approach was employed for the synthesis of 4-thio-L-lyxono-1,4-lactone (19), starting from D-ribono-1,4-lactone (13).