In 2017,Matsumoto, Shoji; Moteki, Jun; Ito, Yuji; Akazome, Motohiro published 《Relationship between mechanochromic behavior and crystal structures in donor-π-acceptor compounds consisted of aromatic rings with ester moiety as an acceptor》.Tetrahedron Letters published the findings.Category: esters-buliding-blocks The information in the text is summarized as follows:
The authors studied the mechanochromic behavior of donor-π-acceptor compounds which consisted of diphenylaminophenylacetylene as a donor-π moiety and (hetero)aromatic ring bearing ester as an acceptor. The compounds with dicyanobenzoic ester gave the bathochromic shift by grinding, whereas the compounds consisting of the ester with benzene, imidazole, and thiazole rings showed the hypsochromic shift. From single-crystal x-ray anal., the authors revealed that the compound with bathochromic shift gave the herringbone alignment with H-aggregate-like π-stacking in the crystal structure. On the contrary, the compounds with hypsochromic shift showed the structure with the alignment of long axis of the mol. in crystal structure. In the experiment, the researchers used Ethyl 2-amino-2-thioxoacetate(cas: 16982-21-1Category: esters-buliding-blocks)
Ethyl 2-amino-2-thioxoacetate(cas: 16982-21-1) belongs to anime. Hydrogen peroxide (H2O2) and peroxy acids generally add an oxygen atom to the nitrogen of amines. With primary amines, this step is normally followed by further oxidation, leading to nitroso compounds, RNO, or nitro compounds, RNO2. Secondary amines are converted to hydroxylamines, R2NOH, and tertiary amines to amine oxides, R3NO.Category: esters-buliding-blocks
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics