1. 2-[(tert-But-oxy-carbonyl-amino)-oxy]acetic acid
Jing-Yu Zhang, Yan Tong, Shengqi Wang Acta Crystallogr Sect E Struct Rep Online. 2011 Sep 1;67(Pt 9):o2324. doi: 10.1107/S1600536811031990. Epub 2011 Aug 11.
The title compound, C(7)H(13)NO(5), was prepared by the condensation of O-(carb-oxy-meth-yl)hydroxyl-amine and (Boc)(2)O (Boc = but-oxy-carbon-yl).In the crystal, mol-ecules are linked by weak inter-molecular N-H⋯O hydrogen bonds.
2. Phosphonate-phosphinate rearrangement
Renzhe Qian, Alexander Roller, Friedrich Hammerschmidt J Org Chem. 2015 Jan 16;80(2):1082-91. doi: 10.1021/jo502567j.
LiTMP metalated dimethyl N-Boc-phosphoramidates derived from 1-phenylethylamine and 1,2,3,4-tetrahydronaphthalen-1-ylamine highly selectively at the CH3O group to generate short-lived oxymethyllithiums. These isomerized to diastereomeric hydroxymethylphosphonamidates (phosphate-phosphonate rearrangement). However, s-BuLi converted the dimethyl N-Boc-phosphoramidate derived from 1-phenylethylamine to the N-Boc α-aminophosphonate preferentially. Only s-BuLi deprotonated dimethyl hydroxymethylphosphonamidates at the benzylic position and dimethyl N-Boc α-aminophosphonates at the CH3O group to induce phosphonate-phosphinate rearrangements. In the former case, the migration of the phosphorus substituent from the nitrogen to the carbon atom followed a retentive course with some racemization because of the involvement of a benzyllithium as an intermediate.
3. Construction of Bi2O2CO3/Ti3C2 heterojunctions for enhancing the visible-light photocatalytic activity of tetracycline degradation
Bihui Tan, Yu Fang, Qianlin Chen, Xianquan Ao, Yang Cao J Colloid Interface Sci. 2021 Nov;601:581-593. doi: 10.1016/j.jcis.2021.05.155. Epub 2021 May 28.
Bi2O2CO3 (BOC) was successfully loaded on a highly conductive Ti3C2 surface by the hydrothermal method, forming a unique BOC/Ti3C2 heterostructure. The use of advanced characterization methods reveals the composition, morphology and photoelectric properties of the material. The results show that the interface formed by close contact between BOC and Ti3C2 provides an effective channel for charge transfer between the two. Importantly, the photocatalytic degradation efficiency of BOC/Ti3C2 for tetracycline (TC) is ~80%, which is significantly higher than the degradation efficiency of pure BOC and pure Ti3C2 for TC. In addition, BOC/Ti3C2 still has high catalytic activity in the degradation of complex mixed antibiotics. This is because BOC and Ti3C2 have large specific surface areas, high light absorption capacity and efficient carrier separation after recombination. At the same time, the detected superoxide radicals (O2-) and holes (h+) are the main active substances. The degradation pathway and catalytic mechanism of the photocatalytic degradation of TC by BOC/Ti3C2 are further explained. This research designed and developed a BOC/Ti3C2 composite material for the photocatalytic degradation of tetracycline and mixed antibiotic wastewater, providing experimental methods and ideas for actual wastewater treatment.
