4-isopropyl-4-methyloxetan-2-one

• 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: 4-isopropyl-4-methyloxetan-2-one
• 英文别名: 4-Methyl-4-propan-2-yloxetan-2-one；4-methyl-4-propan-2-yloxetan-2-one
• 化学式: C₇H₁₂O₂
• 分子量: 128.171
• InChiKey: SSMUKAUYTNROHC-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.4
• 重原子数：
  9
• 可旋转键数：
  1
• 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：

  2,3-二甲基-1-丁烯 在 bis(tetrahydrofuran)octaethylporphyrinato aluminum tetracarbonyl cobaltate 、 间氯过氧苯甲酸 作用下， 以 二氯甲烷 、 异丙醚 为溶剂， 22.0 ℃ 、6.21 MPa 条件下， 反应 24.0h， 生成 4-isopropyl-4-methyloxetan-2-one
  参考文献：
  名称：

  2,2-二取代环氧化物的区域选择性羰基化：酮基羟醛产品的替代途径

  摘要：

  我们报告了 2,2-二取代环氧化物到 β,β-二取代 β-内酯的区域选择性羰基化。机理研究表明，环氧化物开环是周转限制步骤，这一见解有助于使用弱供体的醚溶剂开发改进的反应条件。广泛的环氧化物可以羰基化为 β-内酯，随后开环产生基于酮的醛醇加合物，为 Mukaiyama 醛醇反应提供替代方案。对映纯的环氧化物被证明经过羰基化/开环过程并保留立体化学以形成对映纯的 β-羟基酯。

  DOI：

  10.1021/jacs.8b12286

文献信息

• [EN] SYSTEMS AND METHODS FOR REGIOSELECTIVE CARBONYLATION OF 2,2-DISUBSTITUTED EPOXIDES<br/>[FR] SYSTÈMES ET PROCÉDÉS DE CARBONYLATION RÉGIOSÉLECTIVE D'ÉPOXYDES 2,2-DISUBSTITUÉS
  申请人：UNIV CORNELL

  公开号：WO2020102816A1

  公开（公告）日：2020-05-22

  Provided are methods of carbonylating cyclic substrates to produce carbonyl ated cyclic products. The cyclic substrates may be 2, 2-di substituted epoxides and the cyclic products may be β,β-di substituted lactones. The method may be carried out by forming and pressurizing a reaction mixture of the cyclic substrate, a solvent, carbon monoxide, and a [LA+][CO(CO)4-] catalyst, where [LA+] is a Lewis acid capable of coordinating to the cyclic substrate. The method may proceed with a regioselectivity of 90:10 or greater. The resulting carbonylated cyclic products may be converted to ketone aldol products that retain the stereochemistry and enantiomeric ratio of the carbonyl ated cyclic products.

  提供了一种将环状底物羰基化以产生羰基化环状产物的方法。环状底物可以是2,2-二取代环氧化物，环状产物可以是β,β-二取代内酯。该方法可以通过形成并加压环状底物、溶剂、一氧化碳和[LA+][CO(CO)4-]催化剂的反应混合物来进行，其中[LA+]是能够与环状底物配位的路易斯酸。该方法可能以90:10或更高的区域选择性进行。所得的羰基化环状产物可以转化为保留羰基化环状产物的立体化学和对映比的酮醇产物。
• ETHERS AND ESTERS OF TERTIARY ALKANOLS FOR USE AS AROMA CHEMICALS
  申请人：BASF SE

  公开号：EP3640233A1

  公开（公告）日：2020-04-22

  The present invention relates to the use of an ether or an ester of a tertiary alkanol or of mixtures of two or more ethers or esters of tertiary alkanols or of a stereoisomer thereof or of a mixture of two or more stereoisomers thereof as aroma chemicals; to the use thereof for modifying the scent character of a fragranced composition; to an aroma chemical composition containing an ether or an ester of tertiary alkanol or of mixtures of two or more ethers or esters of tertiary alkanols or of a stereoisomer thereof or of a mixture of two or more stereoisomers thereof; and to a method of preparing a fragranced composition or for modifying the scent character of a fragranced composition. The invention further relates to specific ethers or esters of tertiary alkanols.

  本发明涉及一种三级烷醇的醚或酯或两种或两种以上三级烷醇的醚或酯或其立体异构体的混合物或其两种或两种以上立体异构体的混合物作为芳香化学品的用途；其用于改变芳香组合物的香味特征；含有叔烷醇醚或酯或两种或两种以上叔烷醇醚或酯的混合物或其立体异构体或其两种或两种以上立体异构体的混合物的芳香化学组合物；以及制备芳香组合物或改变芳香组合物香味特征的方法。 本发明还涉及叔烷醇的特定醚或酯。
• SYSTEMS AND METHODS FOR REGIOSELECTIVE CARBONYLATION OF 2,2-DISUBSTITUTED EPOXIDES
  申请人：CORNELL UNIVERSITY

  公开号：US20210403445A1

  公开（公告）日：2021-12-30

  Provided are methods of carbonylating cyclic substrates to produce carbonylated cyclic products. The cyclic substrates may be 2, 2-di substituted epoxides and the cyclic products may be β,β-di substituted lactones. The method may be carried out by forming and pressurizing a reaction mixture of the cyclic substrate, a solvent, carbon monoxide, and a [LA + ][CO(CO)4 − ] catalyst, where [LA + ] is a Lewis acid capable of coordinating to the cyclic substrate. The method may proceed with a regio selectivity of 90:10 or greater. The resulting carbonylated cyclic products may be converted to ketone aldol products that retain the stereochemistry and enantiomeric ratio of the carbonylated cyclic products.
• Regioselective Carbonylation of 2,2-Disubstituted Epoxides: An Alternative Route to Ketone-Based Aldol Products
  作者：Aran K. Hubbell、Anne M. LaPointe、Jessica R. Lamb、Geoffrey W. Coates

  DOI：10.1021/jacs.8b12286

  日期：2019.2.13

  report the regioselective carbonylation of 2,2-disubstituted epoxides to β,β-disubstituted β-lactones. Mechanistic studies revealed epoxide ring-opening as the turnover limiting step, an insight that facilitated the development of improved reaction conditions using weakly donating, ethereal solvents. A wide range of epoxides can be carbonylated to β-lactones, which are subsequently ring-opened to produce

  我们报告了 2,2-二取代环氧化物到 β,β-二取代 β-内酯的区域选择性羰基化。机理研究表明，环氧化物开环是周转限制步骤，这一见解有助于使用弱供体的醚溶剂开发改进的反应条件。广泛的环氧化物可以羰基化为 β-内酯，随后开环产生基于酮的醛醇加合物，为 Mukaiyama 醛醇反应提供替代方案。对映纯的环氧化物被证明经过羰基化/开环过程并保留立体化学以形成对映纯的 β-羟基酯。