A Reductive Deuteration Approach to the Efficient Synthesis of Deuterated Polymers
作者:Yanhong Dong、Jie An、Lei Ning、Lijun Wang、Mengqi Peng、Zixuan Qin、Hengzhao Li、Shangzhong Liu
DOI:10.1055/a-1796-7064
日期:2022.5
Deuterated polymers have wide applications but limited synthetic methods. In this study, we report an efficient two-step approach for the synthesis of deuterated polyesters and polyurethanes. Firstly, two practical single-electron transfer (SET) reductive-deuteration methods have been developed for site-selective introduction of C(sp3)–D into diol monomers. Nine deuterated diol monomers with high deuterium
氘代聚合物应用广泛,但合成方法有限。在这项研究中,我们报告了一种有效的两步法合成氘代聚酯和聚氨酯。首先,已经开发了两种实用的单电子转移 (SET) 还原-氘化方法,用于将 C(sp 3 )-D 位点选择性引入二醇单体中。在 SmI 2 -D 2 O 和/或 Na-EtOD- d 1下合成了九种具有高氘掺入的氘化二醇单体SET 还原氘条件。然后,使用这些氘代单体在典型的聚合条件下合成了六种典型的氘代聚酯和聚氨酯。在所有合成的聚合物中,充分保持了高氘掺入,这展示了该方法在合成具有位点特异性氘标记的聚合物中的潜在应用。
Rapid, Homogenous, B-Alkyl Suzuki–Miyaura Cross-Coupling of Boronic Esters
作者:Matthew J. Bock、Scott. E. Denmark
DOI:10.1021/acs.joc.4c00089
日期:2024.11.15
anhydrous Suzuki–Miyaura cross-coupling of alkylboronic esters with aryl halides is described. Parallel experimentation revealed that the combination of AntPhos, an oxaphosphole ligand, neopentyldiol alkylboronic esters, and potassium trimethylsilanolate (TMSOK) enables successful cross-coupling. In general, reactions proceed in under 1 h with good yields and high linear/branched (l/b) selectivities. Crucially