The homocamptothecin (hCPT) represents a new class of topoisomerase inhibitor which combines enhanced plasma stability and strong antitumor activity. Fluorine imparts desirable characteristics to drugs by modulating both the pharmacokinetics and pharmacodynamic properties of a drug. Therefore, in an attempt to improve the antitumor activity of homocamptothecins, seven new 7-trifluoromethylated homocamptothecin
Construction of CF<sub>3</sub>-Containing Tetrahydropyrano[3,2-<i>b</i>]indoles through DMAP-Catalyzed [4+1]/[3+3] Domino Sequential Annulation
作者:Yannan Zhu、You Huang
DOI:10.1021/acs.orglett.0c02164
日期:2020.9.4
A [4+1]/[3+3] domino sequentialannulation reaction of o-aminotrifluoroacetophenone derivatives and β′-acetoxy allenoates enabled by DMAP has been reported. A variety of CF3-containing tetrahydropyrano[3,2-b]indoles were obtained as a single diastereomer in high yields (≤98%) under mild conditions. The reaction can build one C–N bond, one C–C bond, and one C–O bond sequentially in a single step. The
已经报道了通过DMAP实现的邻氨基三氟苯乙酮衍生物和β'-乙酰氧基烯丙酸酯的[4 + 1] / [3 + 3]多米诺顺序环化反应。在温和条件下以高收率(≤98%)获得了多种含CF 3的四氢吡喃并[3,2- b ]吲哚,为单一非对映异构体。该反应可在一个步骤中依次建立一个C–N键,一个C–C键和一个C–O键。合成效用通过克级反应和产物的各种转化得到证明。
Phosphine‐Catalyzed Intermolecular Annulations of Fluorinated
<i>ortho</i>
‐Aminophenones with Alkynones
<i>–</i>
The Switchable [4+2] or [4+2]/[3+2] Cycloaddition
作者:Yanshun Zhang、Yaoliang Sun、Yin Wei、Min Shi
DOI:10.1002/adsc.201900082
日期:2019.4.23
A phosphine‐catalyzedintermolecularannulation reaction of functionalized ortho‐aminoacetophenones with alkynones has been disclosed in this paper. A variety of 2‐alkynylquinolines and benzo‐fused indolizine were selectively afforded in moderate to good yields at different reaction temperatures and with different phosphine catalysts via the in situ generated zwitterionic intermediate derived from
Synthesis of fluoromethyl-containing analogs of antitumor alkaloid luotonin A
作者:A. S. Golubev、V. O. Bogomolov、A. F. Shidlovskii、L. G. Dezhenkova、A. S. Peregudov、A. A. Shtil、N. D. Chkanikov
DOI:10.1007/s11172-010-0064-9
日期:2010.1
3-bromomethyl-2-chloro-4-trifluo-romethylquinoline with 4(3H)-quinazolinone with subsequent intramolecular Heck cyclization leads to 7-trifluoromethylluotonin, an analog of the antitumoralkaloid luotonin A. 7-Trifluo-romethylluotonin retains the antitumor activity including apoptosis of cultured tumor cells and inhibiting DNA-topoisomerase I.
已开发出一种合成迄今为止未知的 3-溴甲基-2-氯-4-氟甲基喹啉的简便方法。3-溴甲基-2-氯-4-三氟-甲基喹啉与 4(3H)-喹唑啉酮的偶联以及随后的分子内 Heck 环化导致 7-三氟甲基罗红素,一种抗肿瘤生物碱 luotonin A 的类似物。 7-Trifluo-romethylluotonin 保留了抗肿瘤活性活性包括培养的肿瘤细胞的凋亡和抑制 DNA 拓扑异构酶 I。
An alternative route for synthesis of o-trifluoroacetylanilines as useful fluorine-containing intermediates
A series of o-trifluoroacetyl aniline derivatives were synthesized in three steps. In this method, we first utilized trifluoroacetic anhydride to introduce trifluoroacetyl group to the ortho position of aniline with higher yield than that of some previously reported methods. In addition, the procedure is shown to be highly regiospecific. This type of compounds can be used as the key intermediates in the preparation of a variety of inhibitors of HIV reverse transcriptase which is an important pharmacological target of many anti-AIDS agents. (C) 2010 Elsevier B.V. All rights reserved.