A Readily Synthesized and Highly Active Epoxide Carbonylation Catalyst Based on a Chromium Porphyrin Framework: Expanding the Range of Available β-Lactones
摘要:
Catalytic carbonylation of epoxides to beta-lactones was effected by a highly active and selective bimetallic catalyst comprised of a chromium(III) porphyrin cation and a cobalt tetracarbonyl anion. The complex is readily synthesized from commercially available compounds in high yield. Carbonylation of numerous linear epoxides, as well as bicyclic epoxides derived from 8- and 12-membered hydrocarbons, proceeded with high activity, selectivity, and yield.
Practical β-Lactone Synthesis: Epoxide Carbonylation at 1 atm
作者:John W. Kramer、Emil B. Lobkovsky、Geoffrey W. Coates
DOI:10.1021/ol061292x
日期:2006.8.1
text] A readily prepared bimetallic catalyst is capable of effecting epoxide carbonylation to produce beta-lactones at substantially lower CO pressures than previously reported catalyst systems. A functionally diverse array of beta-lactones is produced in excellent yields at CO pressures as low as 1 atm. This procedure allows for epoxide carbonylation on a multigram scale without the requirement of specialized
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.
The first asymmetric ring-expansion carbonylation of meso-epoxides
作者:Prasad Ganji、Hasim Ibrahim
DOI:10.1039/c2cc35596e
日期:——
The first asymmetric ring-expansion carbonylation of meso-epoxides to β-lactones is reported. Two structurally diverse chiral Cr(III) chloro complexes in conjunction with Co2(CO)8 were shown to be competent catalytic systems for this transformation, displaying significant levels of asymmetric induction of up to 56% ee.
首次报道了介环氧化物与 β-内酯的不对称扩环羰基化反应。研究表明,两种结构不同的手性铬(III)氯配合物与 Co2(CO)8 共同组成的催化体系能够胜任这一转化过程,并显示出高达 56% ee 的显著不对称诱导水平。
Systems and processes for thermolysis of polylactones to produce organic acids
申请人:Novomer, Inc.
公开号:US10457624B2
公开(公告)日:2019-10-29
Reactor systems and processes produce organic acids through thermolysis of polylactones. The reactor systems and processes introduce at least one epoxide reagent and carbon monoxide reagent to at least one reaction vessel through at least one feed stream inlet. The epoxide reagent and carbon monoxide reagent contact at least one carbonylation catalyst to produce at least one beta-lactone intermediate. The beta-lactone intermediate is polymerized with at least one initiator in the presence of a metal cation to produce at least one polylactone product. The polylactone product is heated under thermolysis conditions to produce at least one organic acid product. The processes control the presence of contaminates, impurities, catalytic materials, and/or reagents to provide for highly pure organic acid products.
Processes for producing beta-lactone with heterogenous catalysts
申请人:Novomer, Inc.
公开号:US10590099B1
公开(公告)日:2020-03-17
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.