Réactivité du 3,3-bis(triméthylsilyl)propène vis-à-vis des ions iminium issus d'amines secondaires. Accès stéréosélectif à des (E)-β-aminovinylsilanes
摘要:
The 3,3-bis(trimethylsilyl)propene reacts with iminium ions generated in situ from secondary amines by an aminomethylation-desilylation process, leading to (E)-beta-aminovinylsilanes. When a secondary amine with two secondary groups is used, the reaction fails, the steric hindrance probably inhibiting the reaction.
Manipulation of fluorescent and colorimetric changes of fluorescein derivatives and applications for sensing silver ions
作者:K. M. K. Swamy、Ha Na Kim、Jung Huyn Soh、Youngmee Kim、Sung-Jin Kim、Juyoung Yoon
DOI:10.1039/b819538b
日期:——
Three structurally similar compounds, 1–3, bearing a fluorescence chromophore to which are appended morpholine, thiomorpholine and methylpiperazine substituents, display opposite fluorescence responses to pH changes, in contrast to that observed for fluorescein; 1 and 2 have extremely high binding selectivity towards Ag+ ions and show completely different fluorescent and colorimetric changes upon addition of Ag+, and the differences are proposed to be associated with different binding modes of 1 and 2 to this metal ion.
Casado, Julia; Mosquera, Manuel; Paz, L. Carlos, Journal of the Chemical Society. Perkin transactions II, 1984, p. 1963 - 1966
作者:Casado, Julia、Mosquera, Manuel、Paz, L. Carlos、Prieto, M. Flor Rodriguez、Tato, Jose Vazquez
DOI:——
日期:——
Novel 7-hydroxycoumarin based fluorescent labels
作者:Maciej Adamczyk、Michael Cornwell、Jeff Huff、Sushil Rege、Tata Venkata S. Rao
DOI:10.1016/s0960-894x(97)00345-4
日期:1997.8
Five new 7-hydroxy-8-(N-alkylaminomethyl)coumarin labels (6a-e) were prepared from 4-(4-carboxybutyl)-7-hydroxycoumarin (4) in 28-48% yield. Compared to 4-methylumbelliferone (4-MU, 1), the new fluorescent labels exhibited higher emission intensity over a broader pH range. Extinction coefficients, quantum yields and pKa values are also reported for these labels. (C) 1997 Elsevier Science Ltd.
Aminoalcohols Related to Tramadol (Tramal®)
作者:Petra Horstmann、Bernard Unterhalt
DOI:10.1002/ardp.19973301109
日期:——
Aminoalcoholsrelated to the opioid tramadol (1) were synthesised. Their binding capacities to subtypes of the opioid receptor were tested.
合成了与阿片类曲马多 (1) 相关的氨基醇。测试了它们与阿片受体亚型的结合能力。
Réactivité du 3,3-bis(triméthylsilyl)propène vis-à-vis des ions iminium issus d'amines secondaires. Accès stéréosélectif à des (E)-β-aminovinylsilanes
The 3,3-bis(trimethylsilyl)propene reacts with iminium ions generated in situ from secondary amines by an aminomethylation-desilylation process, leading to (E)-beta-aminovinylsilanes. When a secondary amine with two secondary groups is used, the reaction fails, the steric hindrance probably inhibiting the reaction.