Photosensitisation by voriconazole-N-oxide results from a sequence of solvent and pH-dependent photochemical and thermal reactions
作者:P. Morlière、A.M.S. Silva、R.S.G.R. Seixas、F. Boscá、J.-C. Mazière、J. Ferreira、R. Santus、P. Filipe
DOI:10.1016/j.jphotobiol.2018.07.023
日期:2018.10
solutions is 0.6. VNOP has been identified as (2R,3S)-2-(2,4-difluorophenyl)-3-(5-fluoro-7-oxa-1,3-diazabicyclo[4.1.0]hepta-2,4-dien-4-yl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol. VNOP undergoes a marked thermal degradation and an efficient UVA photolysis with well differentiated kinetics and end-products. The temperature-dependent VNOP dark degradation produces a single product VNOPD identified as 6-[(2S
伏立康唑(VN)在严重真菌感染的治疗中的光毒性经常被报道。它的主要代谢产物N氧化物衍生物(VNO)被怀疑是光敏剂,因为它在水溶液中在约310 nm处显示出最大吸收。据报道,VNO光产物(VNOP)对人角质形成细胞具有光毒性。进行稳态和激光闪光光解以阐明VNO和VNOP的光毒性。在缓冲或酒精溶液中,UVB-UVA光产生的VNOP的量子产率为0.6。VNOP已被鉴定为(2R,3S)-2-(2,4-二氟苯基)-3-(5-氟-7-氧杂-1,3-二氮杂双环[4.1.0]庚二-2,4-二烯- 4-基)-1-(1H-1,2,4-三唑-1-基)丁-2-醇。VNOP经历了明显的热降解和有效的UVA光解,动力学和最终产物差异很大。温度相关的VNOP暗降解会产生单一产物VNOPD,确定为6-[((2S,3R)-3-(2,4-二氟苯基)-3-羟基-4-(1H-1,2,4-三唑- 1-基)丁烷-2-基] -5-氟嘧啶-4-醇,在308