本报告描述了一种新型光交联剂,即 4-甲基吡喃咔唑核苷 ( MEP K),可使用可见光诱导交联。此前,我们报道了一种可见光响应的人工核酸,吡喃咔唑核苷(PC X)。MEP K 可以选择性地与互补核酸链中的胸腺嘧啶碱基进行光交联。它是通过在PC X的 4 位引入甲基而合成的,它可以区分胸腺嘧啶和胞嘧啶。先前报道的可见光响应性人工核酸PC X 的合成产率较低。MEP K 由Pechmann 缩合合成它抑制了副产物的形成,使合成更有效,并导致比PC X更高的产率。MEP K 有望作为一种可以用可见光操作并选择性靶向胸腺嘧啶碱基的光交联剂具有实际应用。
通过直接费歇尔吲哚合成法合成了许多新的线性和有角吡咯并香豆素的甲基衍生物。以相同的方式,制备了一些线性2 H,10 H-吡喃并[2,3 - b ]咔唑-2-酮和角2 H,7 H-吡喃并[3,2- c ]咔唑-2-酮。从4-甲基-7-氨基香豆素开始进行合成,并将甲基引入到最有希望化合物对DNA的光反应性的位置。
Synthesis of novel psoralen analogues and their in vitro antitumor activity
作者:Carla S. Francisco、Lígia R. Rodrigues、Nuno M.F.S.A. Cerqueira、Ana M.F. Oliveira-Campos、Lígia M. Rodrigues、Ana P. Esteves
DOI:10.1016/j.bmc.2013.06.049
日期:2013.9
New tetracyclic benzofurocoumarin (benzopsoralen) analogues were synthesized and their inhibitory effect on the growth of tumor cell lines was evaluated. The human tumor cell lines used were MDA MB231 (breast adenocarcinoma), HeLa (cervix adenocarcinoma) and TCC-SUP (bladder transitional cell carcinoma). The in vitro antitumor activity of the new benzopsoralens was discussed in terms of structure–activity
Catalytic Coupling of Arene C–H Bonds and Alkynes for the Synthesis of Coumarins: Substrate Scope and Application to the Development of Neuroimaging Agents
作者:Paul A. Vadola、Dalibor Sames
DOI:10.1021/jo3006842
日期:2012.9.21
C-H bond functionalization offers strategically novel approaches to complex organic compounds. However, many C-H functionalization reactions suffer from poor compatibility with Lewis basic functional groups, especially amines, which are often essential for biological activity. This study describes a systematic examination of the substrate scope of catalytic hydroarylation in the context of complex amino coumarin synthesis. The choice of substrates was guided by the design and development of the next generation of fluorescent false neurotransmitters (FFNs), neuroimaging probes we recently introduced for optical imaging of neurotransmission in the brain. Comparison of two mild protocols using catalytic PtCl4 or Au(PPh3)Cl/AgSbF6 revealed that each method has a broad and mutually complementary substrate scope. The relatively less active platinum system out-performed the gold catalyst with indole substrates lacking substitution at the C-3 position and provided higher regioselectivity in the case of carbazole-based substrates. On the other hand, the more active gold catalyst demonstrated excellent functional group tolerance, and the ability to catalyze the formation of strained, helical products. The development of these two protocols offers enhanced substrate scope and provides versatile synthetic tools required for the structure-activity examination of FFN neuroimaging probes as well as for the synthesis of complex coumarins in general.
RODIGHIERO, P.;CHILIN, A.;PASTORINI, G.;GUIOTTO, A., J. HETEROCYCL. CHEM., 24,(1987) N 4, 1041-1043
作者:RODIGHIERO, P.、CHILIN, A.、PASTORINI, G.、GUIOTTO, A.
DOI:——
日期:——
[EN] METHOD OF PRODUCING PHOTOREACTIVE NUCLEOTIDE ANALOG<br/>[FR] PROCÉDÉ DE PRODUCTION D'UN ANALOGUE NUCLÉOTIDIQUE PHOTORÉACTIF<br/>[JA] 光応答性ヌクレオチドアナログの製造方法