Synthesis of Cyclic Sulfite Diesters and their Evaluation as Sulfur Dioxide (SO
<sub>2</sub>
) Donors
作者:Satish R. Malwal、Kundansingh A. Pardeshi、Harinath Chakrapani
DOI:10.1002/cbic.201900614
日期:2020.4.17
Although sulfurdioxide (SO2 ) finds widespread use in the food industry as its hydrated sulfite form, a number of aspects of SO2 biology remain to be completely understood. Of the tools available for intracellular enhancement of SO2 levels, most suffer from poor cell permeability and a lack of control over SO2 release. We report 1,2-cyclic sulfite diesters as a new class of reliable SO2 donors that
A Copper Metal–Organic Hydrogel as a Catalyst for SO
<sub>2</sub>
and CO
<sub>2</sub>
Fixation under Ambient Conditions
作者:Chandane Kumar Karan、Manish Bhattacharjee
DOI:10.1002/ejic.201900594
日期:2019.8.25
gelator. The metallohydrogel exhibits pH‐responsive nature as well as chemical responsiveness. Besides, it shows rapid thixotropic behavior when external mechanical forces are applied. The metal–organic hydrogel can be used as a heterogeneous catalyst for the reaction of SO2 and CO2 with epoxides to produce cyclic 1,3,2‐dioxathiolane‐2‐oxides and carbonates, respectively. The conversions were found to be
使用基于氨基酸的配体Na 2 HL H 3 L = 2-((3,5-二叔丁基-2-羟基苄基)氨基琥珀酸}}合成了铜金属有机水凝胶(MOG)作为胶凝剂。金属水凝胶具有pH响应性和化学响应性。此外,当施加外力时它表现出快速的触变性。金属有机水凝胶可用作SO 2和CO 2与环氧化物反应分别生成环状1,3,2-二氧杂硫杂环戊烷-2-氧化物和碳酸盐的非均相催化剂。发现转化率取决于环氧化物侧链的大小和类型。
Ionic Pathways in the Photochemistry of Cyclic Sulfite Esters
作者:Rick C. White、Benny E. Arney Jr、Jacob Perry、Nathan Thompson、Phil M. Pithan、Sebastian von Gradowski、Heiko Ihmels
DOI:10.1002/jhet.2687
日期:2017.3
The photochemistry of cyclic carbonate esters proceeds by the photochemical extrusion of carbon dioxide to give 1, 3‐diradicals which produce oxiranes as well as other radical derived species. The corresponding cyclic sulfite esters, upon irradiation, give intermediates that are trapped by alcohols yet generate no oxiranes. These results are consistent with ionic intermediates.
Photoreactions of cyclic sulfite esters: Evidence for diradical intermediates
作者:Rick C White、Benny E Arney、Heiko Ihmels
DOI:10.3762/bjoc.8.134
日期:——
The photochemistry of a phenyl and 1,2-diphenyl substituted sulfite ester is reported. The performance of photoreactions under relatively mild reaction conditions enables the detection of products that have not been observed in previous studies. It is concluded that, complementary to the initially proposed carbene intermediates, diradicals may also be considered.