3-Ylidenephthalides as a new class of transient receptor potential channel TRPA1 and TRPM8 modulators
摘要:
Following the recent identification of the naturally occurring 3-ylidene-4,5-dihydrophthalide ligustilide and its oxidation product dehydroligustilide as novel TRPA1 modulators, a series of seventeen 3-ylide-nephthalides was synthesized and tested on TRPA1 and TRPM8 channels. Most of these compounds acted as strong modulators of the two channel types with EC50 and/or IC50 values distinctly lower than those of the reference compounds. (C) 2013 Elsevier Ltd. All rights reserved.
A simple and efficient palladium-catalyzed intramolecular carbonylativesynthesis of isocoumarins and phthalides from the easily available starting materials by employing phenylformate as a CO surrogate has been achieved. The approach affords target compounds in good to excellent yields with the advantages of lower toxicity, milder conditions, easy operation and wide functional group tolerance.
Divergent Syntheses of (<i>Z</i>)-3-Alkylideneisobenzofuran-1(3<i>H</i>)-ones and 1<i>H</i>-Isochromen-1-ones by Copper-Catalyzed Cycloisomerization of 2-Alkynylbenzoic Acids in Ionic Liquids
作者:Raffaella Mancuso、Christian S. Pomelli、Piera Chiappetta、Katia F. Gioia、Asif Maner、Nadia Marino、Lucia Veltri、Cinzia Chiappe、Bartolo Gabriele
DOI:10.1021/acs.joc.8b00923
日期:2018.6.15
The cycloisomerization of readily available 2-alkynylbenzoic acids 1 in ionic liquids (ILs) as recyclable reaction media has been studied under the catalytic action of CuCl2. With substrates bearing an aryl group on the triple bond, a mixture of (Z)-3-alkylideneisobenzofuran-1(3H)-ones (from 5-exo-dig cyclization) and 1H-isochromen-1-ones (from 6-endo-dig cyclization) was observed in 1-ethyl-3-methylimidazolium
在CuCl 2的催化作用下,已经研究了易得的2-炔基苯甲酸1在离子液体(ILs)中作为可循环反应介质的环异构化。在具有在三键上带有芳基的底物的情况下,(Z)-3-亚烷基亚异苯并呋喃-1(3 H)-ones(来自5 exo - dig环化反应)和1 H -isochromen-1-ones(来自6 -内型-挖环化)的1-乙基-3-甲基咪唑鎓乙基硫酸盐(EmimEtSO观察到4),同时将反应原来是仅朝向使用异苯并呋喃酮的形成选择性ñ乙基N-甲基吗啉二氰胺[Mor 1,2 N(CN)2 ]作为溶剂。当在EmimEtSO 4或Mor 1,2 N(CN)2中使用带有末端三键的底物时,也有选择地获得了5元产物。另一方面,在EmimEtSO 4中,三键上带有烷基或烯基的2-炔基苯甲酸选择性地导致1 H -isochromen-1- one ,而在Mor 1中观察到区域异构混合物的形成。2 N(CN)2。
Palladium-Catalyzed Synthesis of Isocoumarins and Phthalides via <i>tert</i>-Butyl Isocyanide Insertion
作者:Xiang-Dong Fei、Zhi-Yuan Ge、Ting Tang、Yong-Ming Zhu、Shun-Jun Ji
DOI:10.1021/jo302004u
日期:2012.11.16
efficient strategy for the synthesis of isocoumarins and phthalides through a palladium(0)-catalyzed reaction incorporating tert-butyl isocyanide has been developed. This process, providing one of the simplest methods for the synthesis of this class of valuable lactones, involves two steps including cyclization reaction and simple acid hydrolysis. The methodology is tolerant of a wide range of substrates
novel nickel catalyst for the reaction of tert-butyl isocyanide insertion was discovered. In this approach, 1,2-bis(diphenylphosphino)ethane (L3) serves as an efficient ligand, thereby allowing the preparation of lactones from (o-bromophenyl)phenylethanone derivatives. It is noteworthy that this is the first example of nickel acting as a metal catalyst in the reactions of tert-butyl isocyanide insertion
The first asymmetric hydrogenation of 3‐ylidenephthalides has been developed using the IrI complex of a spiro[4,4]‐1,6‐nonadiene‐based phosphine‐oxazoline ligand (SpinPHOX) as the catalyst, affording a wide variety of chiral 3‐substituted phthalides in excellent enantiomeric excesses (up to 98 % ee). The utility of the protocol has been demonstrated in the asymmetricsynthesis of chiral drugs NBP and