Effect of substituents on the photochromism of a spiro[indolinenaphthoxazine] under laser excitation was written by Kellmann, A.;Tfibel, F.;Guglielmetti, R.. And the article was included in Journal of Photochemistry and Photobiology, A: Chemistry in 1995.Application In Synthesis of 1,3,3-Trimethyl-6′-(piperidin-1-yl)spiro[indoline-2,3′-naphtho[2,1-b][1,4]oxazine] This article mentions the following:
Spirooxazines have been extensively investigated in the last few years because of their remarkable photostability. Laser flash photolysis was used to study the mechanism of the photocoloration reaction of a spiro[indolinenaphthoxazine] substituted either with an electron-withdrawing group, the 8′-nitro derivative (compound I), or with electron-donating groups, the 6′-morpholino and 6′-piperidino derivatives (compounds II and III), in toluene solution at 297 K; the unsubstituted compound (IV) was also studied for comparison. The photomerocyanine is formed in the photocoloration process via a triplet pathway in the case of I with a high quantum yield (0.7), as was previously observed for homologous nitroindolinospiropyrans. In the case of electron-donating compounds (II and III) the photomerocyanine is formed exclusively via an excited singlet pathway; however, the quantum yields of photocoloration are much higher for compounds II and III (0.5) than for the unsubstituted one (0.2), but lower than for the nitro derivative In the experiment, the researchers used many compounds, for example, 1,3,3-Trimethyl-6′-(piperidin-1-yl)spiro[indoline-2,3′-naphtho[2,1-b][1,4]oxazine] (cas: 114747-45-4Application In Synthesis of 1,3,3-Trimethyl-6′-(piperidin-1-yl)spiro[indoline-2,3′-naphtho[2,1-b][1,4]oxazine]).
1,3,3-Trimethyl-6′-(piperidin-1-yl)spiro[indoline-2,3′-naphtho[2,1-b][1,4]oxazine] (cas: 114747-45-4) belongs to piperidine derivatives. The piperidine moiety constitutes an important building block for the synthesis of a variety of bioactive natural products, alkaloids and other drugs. Piperidine derivatives bearing a masked aldehyde function in the 蔚-position are easily transformed into quinolizidine compounds through intramolecular reductive amination.Application In Synthesis of 1,3,3-Trimethyl-6′-(piperidin-1-yl)spiro[indoline-2,3′-naphtho[2,1-b][1,4]oxazine]
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem