Chlorine-Free Synthesis of Organic Alkyl Carbonates and Five- and Six-Membered Cyclic Carbonates
作者:Sang-Hyun Pyo、Rajni Hatti-Kaul
DOI:10.1002/adsc.201500654
日期:2016.3.3
report presents a new, one‐pot, facile, selective and green method for methoxycarbonylation of alcohols and synthesis of five‐ and six‐membered cyclic carbonates from corresponding alcohols with dimethyl carbonate (DMC) in the presence of molecular sieves without any additional solvent and catalyst. Syntheses of bifunctional structures comprising a six‐membered cyclic carbonate with allyl ether and methacrylate
Allyl ether‐functional polycarbonates, synthesized by organocatalytic ring‐opening polymerization of the six‐membered cyclic carbonate monomer 2‐allyloxymethyl‐2‐ethyltrimethylene carbonate, were used to prepare non‐polyether polymerelectrolytes. UV‐crosslinking of the allyl sidegroups provided mechanically stable electrolytes with improved molecular flexibility—Tg below −20 °C—and higher ionic conductivity—up
Ring-Closing Depolymerization: A Powerful Tool for Synthesizing the Allyloxy-Functionalized Six-Membered Aliphatic Carbonate Monomer 2-Allyloxymethyl-2-ethyltrimethylene Carbonate
and controlled polymerization with a low dispersity (Đ = 1.2). The availability and activity of the functionality of poly(AOMEC)s were established through subsequentpostpolymerization functionalization via the UV-initiated thiol–ene chemistry of poly(AOMEC) with 1-dodecanethiol and benzophenone as a radical initiator. The functionalization proceeded with high control and with a linear relation between
闭环解聚被证明是形成六元官能脂肪族碳酸酯单体的强大合成方法,为获得规模大于100的六元官能脂肪族碳酸酯单体提供了一种快速,直接,廉价且绿色的途径。 G。通过烯丙氧基官能化的六元环状碳酸酯单体2-烯丙氧基甲基-2-乙基三亚甲基碳酸酯(AOMEC)的合成观察到了该技术的实用性。从三羟甲基丙烷烯丙基醚,碳酸二乙酯和NaH开始,在单锅本体反应中进行合成,最终AOMEC的收率为63%。合成方法基于此类聚合物的可逆性。观察到由NaH产生的阴离子环境足以介导单体平衡浓度。因此,不需要额外的催化剂来引发解聚。1,5,7-三氮杂双环[4.4.0] dec-5-ene(TBD)被证明是AOMEC开环聚合(ROP)的非常活泼的催化剂,可快速(k p app = 28.2 s –1)和低分散度(Đ)的受控聚合= 1.2)。聚(AOMEC)官能团的可用性和活性是通过随后的后聚合官能化,通过以1-十二烷硫醇和二苯甲酮
networks have gel contents above 90%, and are transparent, hydrophilic, and highly flexible. Antibacterialproperties are achieved by a controlled quaternization of the network's tertiary‐amine and methylation of thiol‐ether functionality, resulting in quaternaryammonium compounds (QACs) and sulfonium compounds. The antibacterialproperties are evaluated against both Escherichia coli and Staphylococcus