5-(2-Methyl-1,3-dioxolan-2-yl)pent-1-en-3-ol | 81033-63-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 5-(2-Methyl-1,3-dioxolan-2-yl)pent-1-en-3-ol
• CAS: 81033-63-8
• 化学式: C₉H₁₆O₃
• 分子量: 172.224
• InChiKey: JTLYHAAKLKXCIT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  12
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.78
• 拓扑面积：
  38.7
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  5-(2-Methyl-1,3-dioxolan-2-yl)pent-1-en-3-ol 在 盐酸 、 二甲基硫 、 sodium hydride 、 臭氧 作用下， 以 四氢呋喃 、 甲醇 为溶剂， 反应 6.5h， 生成 Methyl (Z)-7-oxo-4-(benzyloxy)-2-octenoate
  参考文献：
  名称：

  Reductive Cyclization of Ketones Tethered to Activated Olefins Mediated by Magnesium in Methanol

  摘要：

  The reductive cyclizations of various ketones tethered to activated olefins such as alpha,beta-unsaturated esters, nitriles, sulfoxides, and sulfides were mediated by magnesium in dry methanol in the presence of mercuric chloride. When treated with magnesium in dry methanol at -23-degrees-C all of the ketones except nitrile 9 (42%) and 5-oxa-8-keto-2-enoate 5 (13%) gave excellent yields (79-98%) of mono- and bicyclic alcohol products resulting from carbon-carbon bond formation between the beta-carbon of the activated olefin and the carbonyl carbon. The reaction was accelerated by the catalytic amount of mercuric chloride, although the stereoselectivity was not affected by the catalyst. For all the substrates except 8-keto-2-enoate 3 and 5-aza-8-keto-2-enoate 6, the configuration of the major product was trans between the hydroxy and (methoxycarbonyl)methyl groups. The product isomer ratios were independent of the substrate geometry (E or Z). In contrast to the ketones, aldehydes tethered to alpha,beta-unsaturated esters gave products of simple reduction of the double bond and/or saturated alcohols instead of the cyclized products. When the reaction temperature was lowered, the yields of cyclized product were significantly affected by the production of appreciable amounts of saturated product, but the stereoselectivity was not improved. Under the same reaction conditions alpha,beta-unsaturated sulfoxide 16 gave deoxygenated sulfide 18 (85%) as the major product along with a small amount (9%) of cyclized product 19t. In contrast, sulfone 17 underwent desulfonylation instead of cyclization to give olefin 20 (54%). With excess magnesium (15 equiv), however, alpha,beta-unsaturated sulfoxide 16 gave cyclized sulfide 19t (95%) via deoxygenated sulfide 18. Both 16Z and 16E afforded product 19t as a single isomer. It is suggested that the reductive cyclization of the alpha,beta-unsaturated esters and nitriles proceed by means of nucleophilic attack of a beta-carbon radical anion, formed by initial electron transfer from magnesium metal to the activated olefin, on the carbonyl group. The cyclization of the alpha,beta-unsaturated sulfide proceeds by nucleophilic attack of the ketyl on the olefinic double bond.

  DOI：

  10.1021/jo00085a036
• 作为产物：
  描述：

  3-(2-methyl-[1,3]dioxolan-2-yl)-propan-1-ol 在 草酰氯 、 二甲基亚砜 、 三乙胺 作用下， 以 四氢呋喃 为溶剂， 反应 1.33h， 生成 5-(2-Methyl-1,3-dioxolan-2-yl)pent-1-en-3-ol
  参考文献：
  名称：

  Reductive Cyclization of Ketones Tethered to Activated Olefins Mediated by Magnesium in Methanol

  摘要：

  The reductive cyclizations of various ketones tethered to activated olefins such as alpha,beta-unsaturated esters, nitriles, sulfoxides, and sulfides were mediated by magnesium in dry methanol in the presence of mercuric chloride. When treated with magnesium in dry methanol at -23-degrees-C all of the ketones except nitrile 9 (42%) and 5-oxa-8-keto-2-enoate 5 (13%) gave excellent yields (79-98%) of mono- and bicyclic alcohol products resulting from carbon-carbon bond formation between the beta-carbon of the activated olefin and the carbonyl carbon. The reaction was accelerated by the catalytic amount of mercuric chloride, although the stereoselectivity was not affected by the catalyst. For all the substrates except 8-keto-2-enoate 3 and 5-aza-8-keto-2-enoate 6, the configuration of the major product was trans between the hydroxy and (methoxycarbonyl)methyl groups. The product isomer ratios were independent of the substrate geometry (E or Z). In contrast to the ketones, aldehydes tethered to alpha,beta-unsaturated esters gave products of simple reduction of the double bond and/or saturated alcohols instead of the cyclized products. When the reaction temperature was lowered, the yields of cyclized product were significantly affected by the production of appreciable amounts of saturated product, but the stereoselectivity was not improved. Under the same reaction conditions alpha,beta-unsaturated sulfoxide 16 gave deoxygenated sulfide 18 (85%) as the major product along with a small amount (9%) of cyclized product 19t. In contrast, sulfone 17 underwent desulfonylation instead of cyclization to give olefin 20 (54%). With excess magnesium (15 equiv), however, alpha,beta-unsaturated sulfoxide 16 gave cyclized sulfide 19t (95%) via deoxygenated sulfide 18. Both 16Z and 16E afforded product 19t as a single isomer. It is suggested that the reductive cyclization of the alpha,beta-unsaturated esters and nitriles proceed by means of nucleophilic attack of a beta-carbon radical anion, formed by initial electron transfer from magnesium metal to the activated olefin, on the carbonyl group. The cyclization of the alpha,beta-unsaturated sulfide proceeds by nucleophilic attack of the ketyl on the olefinic double bond.

  DOI：

  10.1021/jo00085a036

文献信息

• Simple Analogues of Qinghaosu (Artemisinin)
  作者：Yun Li、Hong‐Dong Hao、Sergio Wittlin、Yikang Wu

  DOI：10.1002/asia.201200166

  日期：2012.8

  A series of 1,2,4‐trioxanes were synthesized in which the key peroxy bonds were installed through a molybdenum‐catalyzed perhydrolysis of the epoxy rings. A core structure was identified that may serve as a promising lead structure for further investigations because of its high antimalarial activity (comparable to that of artesunate and chloroquine), apparent potential for scale‐up and derivatization

  合成了一系列 1,2,4-三恶烷，其中关键的过氧键是通过钼催化的环氧环过水解安装的。确定了一个核心结构，由于其高抗疟活性（与青蒿琥酯和氯喹相当）、放大和衍生化的明显潜力以及使用紫外光易于监测/追踪，因此可以作为有希望的进一步研究的先导结构.
• Applications of Zr-Catalyzed Carbomagnesation and Mo-Catalyzed Macrocyclic Ring Closing Metathesis in Asymmetric Synthesis. Enantioselective Total Synthesis of Sch 38516 (Fluvirucin B₁)
  作者：Zhongmin Xu、Charles W. Johannes、Ahmad F. Houri、Daniel S. La、Derek A. Cogan、Gloria E. Hofilena、Amir H. Hoveyda

  DOI：10.1021/ja972191k

  日期：1997.10.1

  B1, is described. The synthesis includes a convergent asymmetric preparation of amine 17 and acid 18, which are then united to afford diene 62. Metal-catalyzed transformations play a crucial role in the synthesis of the latter moiety. Of particular note are the diastereo- and enantioselective Zr-catalyzed alkylations, a tandem Ti- and Ni-catalyzed process that constitutes a hydrovinylation reaction,

  描述了抗真菌剂 Sch 38516（也称为氟病毒素 B1）的第一个对映选择性全合成。该合成包括胺 17 和酸 18 的会聚不对称制备，然后将它们结合以提供二烯 62。金属催化的转化在后者部分的合成中起着至关重要的作用。特别值得注意的是非对映选择性和对映选择性 Zr 催化的烷基化、构成加氢乙烯基化反应的串联 Ti 和 Ni 催化过程以及 Ru 催化的醇氧化以提供羧酸 18。必需的碳水化合物 38 在高度非对映选择性和对映选择性时尚。碳水化合物部分的光学纯度源于使用 Sharpless 的不对称二羟基化方法；非对映化学控制是通过选择性偶极 [3 + 2] 环加成反应实现的，并使用容易获得的胺作为手性助剂。适当装备的碳水化合物 71 和二烯 62 通过有效结合...
• Reductive Cyclization of Ketones Tethered to Activated Olefins Mediated by Magnesium in Methanol
  作者：Ge Hyeong Lee、Eun Bok Choi、Eun Lee、Chwang Siek Pak

  DOI：10.1021/jo00085a036

  日期：1994.3

  The reductive cyclizations of various ketones tethered to activated olefins such as alpha,beta-unsaturated esters, nitriles, sulfoxides, and sulfides were mediated by magnesium in dry methanol in the presence of mercuric chloride. When treated with magnesium in dry methanol at -23-degrees-C all of the ketones except nitrile 9 (42%) and 5-oxa-8-keto-2-enoate 5 (13%) gave excellent yields (79-98%) of mono- and bicyclic alcohol products resulting from carbon-carbon bond formation between the beta-carbon of the activated olefin and the carbonyl carbon. The reaction was accelerated by the catalytic amount of mercuric chloride, although the stereoselectivity was not affected by the catalyst. For all the substrates except 8-keto-2-enoate 3 and 5-aza-8-keto-2-enoate 6, the configuration of the major product was trans between the hydroxy and (methoxycarbonyl)methyl groups. The product isomer ratios were independent of the substrate geometry (E or Z). In contrast to the ketones, aldehydes tethered to alpha,beta-unsaturated esters gave products of simple reduction of the double bond and/or saturated alcohols instead of the cyclized products. When the reaction temperature was lowered, the yields of cyclized product were significantly affected by the production of appreciable amounts of saturated product, but the stereoselectivity was not improved. Under the same reaction conditions alpha,beta-unsaturated sulfoxide 16 gave deoxygenated sulfide 18 (85%) as the major product along with a small amount (9%) of cyclized product 19t. In contrast, sulfone 17 underwent desulfonylation instead of cyclization to give olefin 20 (54%). With excess magnesium (15 equiv), however, alpha,beta-unsaturated sulfoxide 16 gave cyclized sulfide 19t (95%) via deoxygenated sulfide 18. Both 16Z and 16E afforded product 19t as a single isomer. It is suggested that the reductive cyclization of the alpha,beta-unsaturated esters and nitriles proceed by means of nucleophilic attack of a beta-carbon radical anion, formed by initial electron transfer from magnesium metal to the activated olefin, on the carbonyl group. The cyclization of the alpha,beta-unsaturated sulfide proceeds by nucleophilic attack of the ketyl on the olefinic double bond.