16619-51-5Relevant articles and documents
Visible Light Promoted Chan-Lam Reaction and Cycloaddition to Prepare Chromeno[4,3-c]isoxazolidines in One-Pot Reaction
Huang, Bing-Qing,Ma, Xiao-Pan,Mo, Dong-Liang,Zhao, Jie,Zhu, Bin-Can
, p. 4575 - 4581 (2021/08/13)
A variety of chromeno[4,3-c]isoxazolidines were prepared in good yields through visible light promoted Chan-Lam reaction and [3+2] cycloaddition cascade reaction in one pot. Mechanistic studies showed that visible light promoted both Chan-Lam reaction and cycloaddition. The obtained products were converted to various useful chromenone derivatives. Moreover, the reaction was easily performed at gram scales with the purification of products without column chromatography and used to efficiently synthesize estrone-derived chromeno[4,3-c]isoxazolidine. (Figure presented.).
Iodine-mediated direct synthesis of 3-iodoflavones
Patil, Avinash M.,Kamble, Dayanand A.,Lokhande, Pradeep D.
, p. 1299 - 1307 (2018/04/05)
Molecular iodine has been used for the regioselective, one pot, direct synthesis of 3-iodoflavones from 2′-allyloxy chalcones, 2′-hydroxy chalcones and flavones. Allyl deprotection, cyclization dehydrogenation and α-iodination of 2′-allyloxychalcones has been achieved in a single step to offer 3-iodoflavones.
Chroman-4-ones via microwave-promoted domino Claisen rearrangement-oxa-michael addition: Synthesis of tabchromones A and B
Schmidt, Bernd,Riemer, Martin,Schilde, Uwe
supporting information, p. 2943 - 2946 (2015/02/05)
Allyl phenyl ethers with a pendant enone substituent undergo, upon microwave irradiation, a domino sequence of Claisen rearrangement and 6-endo-trig-cyclization to furnish functionalized chroman-4-ones. The natural products tabchromones A and B were synthesized via this method.