An article General approach to substituted naphtho[1,2-b]benzofurans via photochemical 6 pi-electrocyclization of benzofuranyl containing cinnamonitriles WOS:000663120400015 published article about PHOTOCHROMIC DIARYLETHENES; PHOTOINDUCED REARRANGEMENT; PHOTOCYCLIZATION; 2-VINYLBIPHENYL; CONDENSATION; ARYLGLYOXALS; REACTIVITY; MEMORIES in [Lichitsky, Boris, V; Karibov, Turan T.; Melekhina, Valeriya G.; Komogortsev, Andrey N.; Fakhrutdinov, Artem N.; Minyaev, Mikhail E.; Krayushkin, Michail M.] Russian Acad Sci, ND Zelinsky Inst Organ Chem, Leninsky Pr 47, Moscow 119991, Russia in 2021, Cited 45. The Name is 3,4-Dimethoxybenzaldehyde. Through research, I have a further understanding and discovery of 120-14-9. Category: indole-building-block
At the first time, we elaborated the method of synthesis of naphtho[1,2-b]benzofurans based on photoinduced reaction of acrylonitriles containing 2-arylbenzofuran fragment as part of 1,3,5-hexatriene system. The considered reaction proceeds via initial 6 pi-electrocyclization followed by [1,9]-H sigmatropic shift and final oxidative aromatization of central benzene ring. It was shown that 5,6-dihydronaphtho[1,2-b]benzofurans are key intermediates of studied process. The structures of obtained 5,6-dihydronaphtho[1,2- b]benzofuran and one of the target naphtho[1,2-b]benzofurans were confirmed by X-ray diffraction. (C) 2021 Elsevier Ltd. All rights reserved.
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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles