Acrylonitrile Derivatives from Epoxide and Carbon Monoxide Reagents
申请人:Novomer, Inc.
公开号:US20190002400A1
公开(公告)日:2019-01-03
The present invention is directed to reactor systems and processes for producing acrylonitrile and acrylonitrile derivatives. In preferred embodiments of the present invention, the processes comprise the following steps: introducing an epoxide reagent and carbon monoxide reagent to at least one reaction vessel through at least one feed stream inlet; contacting the epoxide reagent and carbon monoxide reagent with a carbonylation catalyst to produce a beta-lactone intermediate; polymerizing the beta-lactone intermediate with an initiator in the presence of a metal cation to produce a polylactone product; heating the polylactone product under thermolysis conditions to produce an organic acid product; optionally esterifying the organic acid product to produce one or more ester products; and reacting the organic acid product and/or ester product with an ammonia reagent under ammoxidation conditions to produce an acrylonitrile product.
Asymmetric Synthesis of Bicyclic β-Lactones via the Intramolecular, Nucleophile-Catalyzed Aldol Lactonization: Improved Efficiency and Expanded Scope
作者:Seong Ho Oh、Guillermo S. Cortez、Daniel Romo
DOI:10.1021/jo050024u
日期:2005.4.1
The intramolecular, nucleophile-catalyzed, aldol lactonization (NCAL) process merges catalytic, asymmetric carbocycle synthesis with β-lactone synthesis. The application of modified Mukaiyama reagents to this process led to greatly improved conversion and efficiency (70−82% yield) and shorter reaction times with no diminution of enantioselectivity (91−98% ee). The process was extended to several new
Chromium(III) Octaethylporphyrinato Tetracarbonylcobaltate: A Highly Active, Selective, and Versatile Catalyst for Epoxide Carbonylation
作者:Joseph A. R. Schmidt、Emil B. Lobkovsky、Geoffrey W. Coates
DOI:10.1021/ja051874u
日期:2005.8.1
of a tetracarbonylcobaltate anion and an octahedral chromium porphyrin complex axially ligated by two THF ligands. Regarding the carbonylation of epoxides to beta-lactones, catalyst 1 exhibits excellent turnover numbers (up to 10,000) and turnover frequencies (up to 1670 h(-1)), with regioselective carbonyl insertion occurring between the oxygen and the sterically less hindered carbon of the epoxide
Bicyclic β-Lactones via Intramolecular NCAL Reactions with Cinchona Alkaloids: Effect of the C9-Substituent on Enantioselectivity and Catalyst Conformation
作者:Guillermo S. Cortez、Seong Ho Oh、Daniel Romo
DOI:10.1055/s-2001-16746
日期:——
C9-Acylated cinchona alkaloids promote an intramolecular, nucleophile-catalyzed aldol-lactonization (NCAL) reaction leading to optically active bicyclic β-lactones. A mechanistic scheme is proposed for this catalytic, asymmetric process. Only small variations in enantioselectivity were observed for a variety of esters, a carbamate, and a carbonate at the C9 position of quinidine. A combination of coupling constants (3 J H8,H9) and nOe data was used to assign predominant solution conformations for these derivatives. Interestingly, a more rigid quinidine derivative gave a complete reversal in the sense of enantioselection.
C9-酰化金鸡纳生物碱可促进分子内亲核催化醛内酯化(NCAL)反应,从而生成具有光学活性的双环δ-内酯。本文提出了这一催化不对称过程的机理方案。在奎尼丁 C9 位置的各种酯、氨基甲酸酯和碳酸酯中,只观察到对映体选择性的微小变化。结合耦合常数(3 J H8、H9)和 nOe 数据,我们为这些衍生物确定了主要的溶液构象。有趣的是,一种硬度更高的奎尼丁衍生物在对映体选择的意义上出现了完全逆转。
PROCESSES FOR PRODUCING BETA-LACTONE AND BETA-LACTONE DERIVATIVES WITH HETEROGENOUS CATALYSTS
申请人:Novomer, Inc.
公开号:US20190047972A1
公开(公告)日:2019-02-14
The present invention is directed to processes from producing beta-lactone and beta-lactone derivatives using heterogenous catalysts. In preferred embodiments of the present invention, the processes comprise the steps: passing a feed stream comprising an epoxide reagent and a carbon monoxide reagent to a reaction zone; contacting the epoxide reagent and the carbon monoxide reagent with a heterogenous catalyst to produce a beta-lactone product in the reaction zone; and removing the beta-lactone product from the reaction zone. In preferred embodiments, the heterogenous catalyst comprises a solid support containing a cationic Lewis acid functional group and a metal carbonyl compound comprising at least one of anionic metal carbonyl compound or a neutral metal carbonyl compound. In certain preferred embodiments, the epoxide reagent and carbon monoxide reagent have a biobased content.