(R)-(-)-2-n-Propyl-γ-butyrolactone | 55232-22-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酯类
• 英文名称: (R)-(-)-2-n-Propyl-γ-butyrolactone
• 英文别名: (3R)-3-Propyloxolan-2-one
• CAS: 55232-22-9
• 化学式: C₇H₁₂O₂
• 分子量: 128.171
• InChiKey: GJWLOODNSXOUKV-ZCFIWIBFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  9
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.86
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  (Z)-α-propylidene-γ-butyrolactone 在 <((R)-(1,1'-binaphthyl-2,2'-diyl)bis(diphenylphosphine))RuCl2>2NEt3 、 Ru₂Cl₄-(S)-(2,2'-bis(diphenylphosphino)-1,1'-binaphthyl)2*NEt₃ 氢气 作用下， 以 二氯甲烷 为溶剂， 50.0 ℃ 、10.13 MPa 条件下， 反应 60.0h， 生成 (R)-(-)-2-n-Propyl-γ-butyrolactone
  参考文献：
  名称：

  Asymmetric Hydrogenation of Olefins with Aprotic Oxygen Functionalities Catalyzed by BINAP-Ru(II) Complexes

  摘要：

  Cyclic alpha,beta-unsaturated ketones, alkylidene lactones, and alkenyl ethers have been hydrogenated in high enantiomeric excesses by use of BINAP-Ru(II) complexes (BINAP = 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl) as catalysts. 2-Alkylidenecyclopentanones were hydrogenated in the presence of [RuCl(BINAP)(benzene)]Cl, Ru2Cl4(BINAP)2(NEt(3)), or Ru(OCO CH3 )(2)(BINAP) in up to 98% ee, while in the case of 2-benzylidene- and 2-(3-phenylpropylidene)cyclopentanones, enantiomeric excesses of the hydrogenation were below 50% under the same conditions. The sense of asymmetric induction as well as the enantioselectivity (95% ee) obtained in the hydrogenation of (E)-2-propylidene-gamma-butyrolactone were the same as those of the (Z)-isomer. Lactones, 2- and 4-alkylidene-gamma-butyrolactones, were converted to the corresponding saturated gamma-butyrolactones in 95% ee. Hydrogenation of diketene with the catalytic system derived from {RuCl[(S)-BINAP](benzene)}Cl and triethylamine or complex Ru2Cl4[(S)-BINAP](2)(NEt(3)) established a new synthetic route to (R)-4-methyl-2-oxetanone, a promising monomer of biodegradable polymers, in up to 97% selectivity and 92% ee. Alkenyl ethers, 2-methylenetetrahydrofuran, and 2-methyl-3,4-dihydrofuran have also been hydrogenated to give 2-methyltetrahydrofuran in 91 and 87% ee, respectively.

  DOI：

  10.1021/jo00107a014

文献信息

• Recyclable polymers based on ring-fused gamma-butyrolactones
  申请人：Colorado State University Research Foundation

  公开号：US10759899B2

  公开（公告）日：2020-09-01

  The invention discloses a class of new polymers, trans-ring-fused poly(4-hydroxybutyrate)s (RF-P4HB) that exhibit a unique set of properties, including robust thermal stability and mechanical strength, quantitative recyclability to the building block monomers via thermolysis and/or chemical catalysis, and convenient production from the chemical ring-opening polymerization under ambient temperature and pressure. Another unique property is the formation of crystalline stereocomplexed polymers with high melting temperature upon mixing the two enantiomeric RF-P4HB chains via stereocomplexing co-crystallization. This invention also provides the corresponding ring-fused lactone monomer structures that enable the synthesis of the RF-P4HB polymers, through trans-fusing of rings to the parent γ-butyrolactone ring. Furthermore, a polymerization or copolymerization process for the synthesis of RF-P4HB polymers and copolymers is disclosed.

  本发明公开了一类新型聚合物--反式环融聚（4-羟基丁酸酯）（RF-P4HB），该聚合物具有一系列独特的性能，包括强大的热稳定性和机械强度，可通过热分解和/或化学催化定量回收为结构单元，以及可在环境温度和压力下通过化学开环聚合反应方便地生产。本发明的另一个独特性质是，通过立体共混共结晶将两种对映异构体 RF-P4HB 链混合后，可形成具有高熔点的结晶立体共混聚合物。本发明还提供了相应的环融内酯单体结构，通过环与母体γ-丁内酯环的反式融合，可合成 RF-P4HB 聚合物。此外，还公开了一种用于合成 RF-P4HB 聚合物和共聚物的聚合或共聚工艺。
• Asymmetric synthesis of 2-substituted butyrolactones and valerolactones
  作者：A. I. Meyers、Yukio Yamamoto、Edward D. Mihelich、Richard A. Bell

  DOI：10.1021/jo01302a009

  日期：1980.7
• RECYCLABLE POLYMERS BASED ON RING-FUSED GAMMA-BUTYROLACTONES
  申请人：Colorado State University Research Foundation

  公开号：US20190040191A1

  公开（公告）日：2019-02-07

  The invention discloses a class of new polymers, trans-ring-fused poly(4-hydroxybutyrate)s (RF-P4HB) that exhibit a unique set of properties, including robust thermal stability and mechanical strength, quantitative recyclability to the building block monomers via thermolysis and/or chemical catalysis, and convenient production from the chemical ring-opening polymerization under ambient temperature and pressure. Another unique property is the formation of crystalline stereocomplexed polymers with high melting temperature upon mixing the two enantiomeric RF-P4HB chains via stereocomplexing co-crystallization. This invention also provides the corresponding ring-fused lactone monomer structures that enable the synthesis of the RF-P4HB polymers, through trans-fusing of rings to the parent γ-butyrolactone ring. Furthermore, a polymerization or copolymerization process for the synthesis of RF-P4HB polymers and copolymers is disclosed.
• Asymmetric Hydrogenation of Olefins with Aprotic Oxygen Functionalities Catalyzed by BINAP-Ru(II) Complexes
  作者：Tetsuo Ohta、Tsutomu Miyake、Nobuo Seido、Hidenori Kumobayashi、Hidemasa Takaya

  DOI：10.1021/jo00107a014

  日期：1995.1

  Cyclic alpha,beta-unsaturated ketones, alkylidene lactones, and alkenyl ethers have been hydrogenated in high enantiomeric excesses by use of BINAP-Ru(II) complexes (BINAP = 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl) as catalysts. 2-Alkylidenecyclopentanones were hydrogenated in the presence of [RuCl(BINAP)(benzene)]Cl, Ru2Cl4(BINAP)2(NEt(3)), or Ru(OCO CH3 )(2)(BINAP) in up to 98% ee, while in the case of 2-benzylidene- and 2-(3-phenylpropylidene)cyclopentanones, enantiomeric excesses of the hydrogenation were below 50% under the same conditions. The sense of asymmetric induction as well as the enantioselectivity (95% ee) obtained in the hydrogenation of (E)-2-propylidene-gamma-butyrolactone were the same as those of the (Z)-isomer. Lactones, 2- and 4-alkylidene-gamma-butyrolactones, were converted to the corresponding saturated gamma-butyrolactones in 95% ee. Hydrogenation of diketene with the catalytic system derived from RuCl[(S)-BINAP](benzene)}Cl and triethylamine or complex Ru2Cl4[(S)-BINAP](2)(NEt(3)) established a new synthetic route to (R)-4-methyl-2-oxetanone, a promising monomer of biodegradable polymers, in up to 97% selectivity and 92% ee. Alkenyl ethers, 2-methylenetetrahydrofuran, and 2-methyl-3,4-dihydrofuran have also been hydrogenated to give 2-methyltetrahydrofuran in 91 and 87% ee, respectively.