262373-15-9Relevant academic research and scientific papers
Transition-Metal-Free Benzannulation of Tricarbonyl Derivatives with Arynes: Access to 1,3-Dinaphthol Precursors for the Synthesis of Rhodamine Dye Analogues
Ghotekar, Ganesh S.,Shaikh, Aslam C.,Muthukrishnan
, p. 2269 - 2276 (2019)
Herein, we report a transition-metal-free annulation reaction of benzynes and 1,3-oxopentanedioate for the synthesis of highly functionalized naphthalene derivatives for the first time. Additionally, the representative naphthalene derivatives have been successfully transformed into the new series of rhodamine dye analogues.
Trifluoromethyl aryl sulfonates (TFMS): An applicable trifluoromethoxylation reagent
Lei, Meng,Miao, Hang,Wang, Xueyuan,Zhang, Wen,Zhu, Chengjian,Lu, Xiaqiang,Shen, Jian,Qin, Yanru,Zhang, Haoyang,Sha, Sijia,Zhu, Yongqiang
, p. 1389 - 1392 (2019/04/30)
Fluorine is probably another favorite hetero-atom for incorporation into small molecules after nitrogen. Among many fluorine-containing groups, trifluoromethyl aryl ethers (ArOCF3) have unique properties in drug design and are difficult to be synthesized, and many different methods were developed to prepare them. A novel one-pot synthesis of o-iodine-aryl trifluoromethyl ethers (ArOCF3I) was described by the reaction of trifluoromethoxylation and iodination with trifluoromethyl aryl sulfonates (TFMS) in this manuscript. The reaction conditions were optimized by screening different solvents, crown ethers, substrates and the ratios and the yields of products were in moderate to high yields (up to 86%).
Copper-Mediated Cascade C-H/N-H Annulation of Indolocarboxamides with Arynes: Construction of Tetracyclic Indoloquinoline Alkaloids
Zhang, Ting-Yu,Liu, Chang,Chen, Chao,Liu, Jian-Xin,Xiang, Heng-Ye,Jiang, Wei,Ding, Tong-Mei,Zhang, Shu-Yu
, p. 220 - 223 (2018/01/17)
An efficient and environmentally benign Cu-mediated method was developed for direct cascade C-H/N-H annulation to construct polyheterocyclic indoloquinoline scaffolds. This method highlights an emerging strategy for transforming inert C-H bonds into versatile functional groups in organic synthesis and provides a new versatile approach for the efficient synthesis of indolo[3,2-c] and [2,3-c]quinoline alkaloids.
Selective: S -arylation of 2-oxazolidinethiones and selective N -arylation of 2-benzoxazolinones/2-benzimidazolinones
Sun, Chu-Han,Lu, Yi,Zhang, Qing,Lu, Rong,Bao, Lin-Qing,Shen, Mei-Hua,Xu, Hua-Dong
supporting information, p. 4058 - 4063 (2017/07/10)
There exist three possible patterns for the reaction of cyclic 2-oxazolidinethione and 2-benzoxazolidinethione with arynes, namely (a) S-arylation, (b) N-arylation, and (c) aryne insertion into the thiocarbonyl group (CS). Our studies demonstrate that S-arylation wins out affording S-aryl dihydrooxazoles. In contrast, for related reactions of cyclic 2-benzoxazolinone and 2-benzimidazolinone with arynes, it is found that N-arylation outcompetes O-arylation and aryne insertion into the CO group to give N-aryl 2-benzoxazolinones and N-aryl 2-benzimidazolinones.
Continuous-flow synthesis of trimethylsilylphenyl perfluorosulfonate benzyne precursors
Michel, Boris,Greaney, Michael F.
supporting information, p. 2684 - 2687 (2014/06/09)
2-(Trimethylsilyl)phenyl perfluorosulfonated aryne precursors may now be accessed using flow chemistry, enabling the fast preparation of pure compounds with no requirement for low temperature lithiation or column chromatography. The process has been adapted to novel nonaflate precursors, utilizing the cheaper and more user-friendly nonaflyl fluoride reagent. The resultant nonaflates are shown to successfully participate in a range of aryne reaction classes.
Synthesis of aryl stannanes from silyl triflates via aryne intermediates
Lakshmi, B. Vasantha,Wefelscheid, Ulrike K.,Kazmaier, Uli
supporting information; experimental part, p. 345 - 348 (2011/04/15)
Aryl stannanes are easily accessible from o-silylated aryl triflates in the presence of KF and Bu3SnH. The corresponding arynes are formed in situ, and undergo clean hydrostannation to give a mixture of the regioisomeric aryl stannanes. The whole reaction sequence can also be carried out as a one-pot reaction under microwave irradiation. Georg Thieme Verlag Stuttgart New York.
Intermolecular N-heterocyclic carbene catalyzed hydroacylation of arynes
Biju, Akkattu T.,Glorius, Frank
supporting information; experimental part, p. 9761 - 9764 (2011/03/16)
A formal introduction: The conceptually new N-heterocyclic carbene catalyzed formal insertion of arynes into the Cformyl-H bond of aldehydes demonstrates the compatibility of nucleophilic NHCs with electrophilic arynes. This NHC-catalyzed hydroacylation of arynes allows the conversion of aliphatic, α,β-unsaturated, and aromatic aldehydes into aryl ketones; 27 examples and a preliminary mechanistic investigation are provided. Copyright
An efficient procedure for the synthesis of ortho-trialkylsilylaryl triflates: Easy access to precursors of functionalized arynes
Pena, Diego,Cobas, Agustin,Perez, Dolores,Guitian, Enrique
, p. 1454 - 1458 (2007/10/03)
o-Trialkylsilylaryl triflates which are useful aryne precursors are prepared from o-bromophenols by an efficient, one-pot procedure involving O-silylation, metal-halogen exchange, O- to C-silyl migration, and entrapment of the phenoxide with triflic anhydride.
