3470-54-0Relevant articles and documents
The role of internal twisting in the photophysics of stilbazolium dyes
Sczepan,Rettig,Tolmachev,Kurdyukov
, p. 3555 - 3561 (2001)
The synthesis of selectively bridged stilbazolium dyes related to DASPMI is described. The comparison of steady-state and time-resolved fluorescence studies as a function of temperature allows one to develop a kinetic model on the basis of which the high photostability and absence of photoisomerization for these dyes can be understood. There are two possible photochemical deactivation channels: non-radiative decay through single-bond twisting which does not lead to a distinguishable photoisomer and through double bond twisting leading to trans-cis photoisomerization. The latter process is more than one order of magnitude slower than single-bond twisting for these compounds and is only observed in the compound where both single bonds are bridged. Lifetime maxima observed at low temperature indicate a further early structural relaxation not connected with bond twisting but with bond length changes.
Conformationally constrained analogues of N′-(4-tert-butylbenzyl)-N-(4-methylsulfonylaminobenzyl)thiourea as TRPV1 antagonists
Lim, Ju-Ok,Jin, Mi-Kyoung,Ryu, HyungChul,Kang, Dong Wook,Lee, Jeewoo,Pearce, Larry V.,Tran, Richard,Toth, Attila,Blumberg, Peter M.
experimental part, p. 322 - 331 (2009/04/07)
A series of bicyclic analogues having indan and tetrahydronaphthalene templates in the A-region were designed as conformationally constrained analogues of our previously reported potent TRPV1 antagonists (1, 3). The activities for rat TRPV1 of the conformationally restricted analogues were moderately or markedly diminished, particularly in the case of the tetrahydronaphthalene analogues. The analysis indicated that steric constraints at the benzylic position in the bicyclic analogues may be an important factor for their unfavorable interaction with the receptor.