1-Thia-3,4-diazolidine-2,5-dione functionality: a photochemical synthon for the azo group
摘要:
The 1-thia-3,4-diazolidine-2,5-dione functional group was shown to yield azo compounds upon photolysis. This photoreaction when combined with the known ability of this group to react in a Diels-Alder fashion or as a dinucelophile toward alkylating agents greatly increases the utility of this functionality. The dual reactivity of this group was demonstrated in the synthesis of a number of 3,4-dialkyl-1-thia-3,4-diazolidine-2,5-diones. The photolysis of these compounds produced either thermally stable cyclic azo compounds or the decomposition products of thermally unstable azo compounds.
Synthesis and Spectral Properties of Macrocyclic Compounds Containing 1,3,4‐Thiadiazole Moeties Connected by a Carbon–Oxygen Bridge
作者:Anita Pati、Manabendra Patra、Rajani K. Behera
DOI:10.1080/00397910600619572
日期:2006.7
Abstract The syntheses of 1∶1‐macrocycles 3 (n=1), unsymmetrical macrocycle 5 (m=0, n=1), 2∶2‐macrocycle 5 (m=n=1 and 2), 3∶3 macrocycle 7, and several open‐chain ethereal compounds prepared from 2,5‐dichloro‐1,3,4‐thiadiazole 1 and various polyethylene glycols dianions are described. Structural proofs are afforded by their mass and NMR spectral features. The quaternization studies of a few macrocycles