269075-46-9Relevant articles and documents
Bi(OTf)3-Mediated (4+1) Annulation of α-Sulfonyl o-Hydroxyacetophenones with α-Hydroxy Arylketones to Access Sulfonyl 2-Aroylbenzofurans
Chang, Meng-Yang,Chen, Kuan-Ting
, p. 2594 - 2609 (2021/03/29)
In this paper, a high-yield, facile route for the scalable synthesis of sulfonyl 2-aroylbenzofurans via a Bi(OTf)3-mediated intermolecular double cyclocondensation of α-sulfonyl o-hydroxyacetophenones with substituted α-hydroxy arylketones under mild open-vessel reaction conditions is described. In the overall reaction, water is generated as the only byproduct. Various metal triflate-promoted reactions and conditions are investigated for the efficient one-pot (4+1) annulation reaction. (Figure presented.).
An easy access to benzofurans via DBU induced condensation reaction of active 2-hydroxy acetophenones with phenacyl chlorides: A novel class of antioxidant agents
Rangaswamy,Kumar, H. Vijay,Harini,Naik, Nagaraja
, p. 938 - 943 (2015/05/13)
A convenient and efficient one-pot synthesis of benzofurans 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n, 3o, 3p, 3q, 3r, 3s, 3t has been described from 2-hydroxy acetophenones and phenacyl chlorides in the presence of DBU. The procedure was applicable for a variety of phenacyl chlorides and provides a variety of benzofurans with higher yields. DBU acts as a base and as well as nucleophiles. All the derivatives were subjected to in vitro antioxidant screenings against representative 2,2'-diphenyl-1-picryl-hydrazyl and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) radicals and results worth for further investigations.
Facile microwave-assisted synthesis of substituted benzofuran derivatives
Liu, Junqiang,Mi, Chenggen,Tang, Xuemei,Cao, Yuan,Li, Zicheng,Huang, Wencai
, p. 2083 - 2090 (2014/05/06)
A series of benzofuran derivatives have been synthesized by use of a microwave-assisted process. Substituted or unsubstituted ?- hydroxyacetophenone and salicylaldehyde reacted with ethyl bromoacetate, ω-bromoacetophenone, or chloroacetone under the action of potassium carbonate in DMF to yield substituted benzofuran derivatives. Compared with conventional heating, this microwave-assisted synthetic process has the advantages of more convenient operation, shorter reaction time, and higher yield.
Synthesis and?antifungal activities of?some?aryl [3-(imidazol-1-yl/triazol-1-ylmethyl) benzofuran-2-yl] ketoximes
Gündo?du-Karaburun, Nalan,Benkli, Kadriye,Tunali, Ya?mur,U?ucu, ümit,Demirayak, ?eref
, p. 651 - 656 (2007/10/03)
In this study, some aryl [3-(imidazol-1-yl/triazol-1-ylmethyl)benzofuran-2-yl] ketones, aryl (3-methyl-benzofuran-2-yl) ketoximes and aryl [3-(imidazol-1-yl/triazol-1-ylmethyl)benzofuran-2-yl] ketoximes were synthesised starting from 2-aryloyl-3-methyl-be
Synthesis and analgesic activity of some 1-benzofurans, 1-benzothiophenes and indoles
Radl, Stanislav,Hezky, Petr,Urbankova, Jitka,Vachal, Petr,Krejci, Ivan
, p. 280 - 296 (2007/10/03)
3-Unsubstituted 1-benzofurans 1e and 1f, 3-methyl-1-benzofurans 1a-1d, and 3-amino-1-benzofurans 2a-21, as well as 3-amino-1-benzothiophenes 3a, 3b and 3-aminoindoles 4a-4f, 11a, and 11b were prepared and tested as analgesics. The 3-amino-1-benzofurans 2 were prepared from the corresponding 2-hydroxybenzonitriles 5 and phenacyl bromides 6 via intermediates 7. Similar treatment of 2-sulfanylbenzonitrile (8) provided 3-amino-1-benzothiophenes 3. Appropriately substituted 2-aminobenzonitriles 9 then provided N-substituted 3-aminoindoles 4. 1-(Ethoxycarbonyl)indoles 4e and 4f were successfully deprotected giving indoles 11a and 11b, respectively.