硼功能化聚合物用于光电子、生物学和医学。生产硼官能化和可降解聚酯的方法仍然非常罕见,但在需要(生物)耗散的情况下是相关的,例如在自组装纳米结构、动态聚合物网络和生物成像中。在这里,硼酸酯-邻苯二甲酸酐和各种环氧化物(氧化环己烯、乙烯基氧化环己烯、氧化丙烯、烯丙基缩水甘油醚)在有机金属配合物 [Zn(II)Mg(II)] 的催化下进行受控开环共聚 (ROCOP)或Al(III)K(I)]或磷腈有机碱。聚合反应得到良好控制,可调节聚酯结构(例如,通过环氧化物选择、AB 或 ABA 嵌段)、摩尔质量(9.4 < M n< 40 kg/mol),以及聚合物中硼官能团(酯、酸、“酯”、环硼氧烷和荧光基团)的吸收。硼酸酯官能化聚合物是无定形的,具有高玻璃化转变温度(81 < T g < 224 °C)和良好的热稳定性(285 < T d< 322°C)。将硼酸酯-聚酯脱保护,得到硼酸-和硼酸酯-聚酯;
Mechanically planar chiral rotaxanes through catalytic desymmetrization
作者:Mingfeng Li、Xiu Li Chia、Chong Tian、Ye Zhu
DOI:10.1016/j.chempr.2022.08.009
日期:2022.10
Establishing mechanical chirality has remained a substantial synthetic hurdle despite the fast-growing applications of interlocked architectures in supramolecular chemistry. Here, we report the development of a catalyst-controlled desymmetrization strategy that decouples the creation of mechanically planar chirality and assembly of interlocked bonds. Employing a novel class of anionic chiral phosphine ligands
An Electrochemical Method for Deborylative Hydroxylation of Arylboronic Acids under Metal‐free Conditions
作者:Zhengjiang Fu、Xuezheng Yi、Ziqi Fang、Tingting Zhong、Dongdong He、Shengmei Guo、Hu Cai
DOI:10.1002/asia.202200780
日期:2022.12.14
An electrochemicaldeborylativehydroxylation of various arylborons has been well established to synthesize phenols under metal-free conditions, whose application was highlighted by drugs synthesis and gram-scale preparation. The protocol featured a simple reaction system, good functional group tolerance and eco-friendly reaction conditions.
Ring Opening Copolymerization of Boron-Containing Anhydride with Epoxides as a Controlled Platform to Functional Polyesters
作者:Fernando Vidal、Sevven Smith、Charlotte K. Williams
DOI:10.1021/jacs.3c03261
日期:2023.6.28
macro-initiator in alternating epoxide/anhydride ROCOP, and lactone ringopening polymerization, produces amphiphilic AB and ABC copolyesters. Alternatively, the boron-functionalities are subjected to Pd(II)-catalyzed cross-couplings to install fluorescent groups (BODIPY). The utility of this new monomer as a platform to construct specialized polyesters materials is exemplified here in the synthesis of fluorescent
硼功能化聚合物用于光电子、生物学和医学。生产硼官能化和可降解聚酯的方法仍然非常罕见,但在需要(生物)耗散的情况下是相关的,例如在自组装纳米结构、动态聚合物网络和生物成像中。在这里,硼酸酯-邻苯二甲酸酐和各种环氧化物(氧化环己烯、乙烯基氧化环己烯、氧化丙烯、烯丙基缩水甘油醚)在有机金属配合物 [Zn(II)Mg(II)] 的催化下进行受控开环共聚 (ROCOP)或Al(III)K(I)]或磷腈有机碱。聚合反应得到良好控制,可调节聚酯结构(例如,通过环氧化物选择、AB 或 ABA 嵌段)、摩尔质量(9.4 < M n< 40 kg/mol),以及聚合物中硼官能团(酯、酸、“酯”、环硼氧烷和荧光基团)的吸收。硼酸酯官能化聚合物是无定形的,具有高玻璃化转变温度(81 < T g < 224 °C)和良好的热稳定性(285 < T d< 322°C)。将硼酸酯-聚酯脱保护,得到硼酸-和硼酸酯-聚酯;