DDQ-Catalyzed Oxidative C(sp3)–H Functionalization of Aryltetralins and Subsequent Chemoselective Oxidative Demethylation to Access Dihydronaphthalenes and Dihydronaphthoquinones
A two carbon homologation of Friedel–Crafts alkylation enabled by photochemical alkene stitching: modular assembly of cyclolignans
作者:Shyamal Pramanik、Apurba Samanta、Soumitra Maity
DOI:10.1039/d4cc00957f
日期:——
efficient two-carbon homologated variant of Friedel–Crafts alkylation via photochemical radical alkene stitching. Readily available feedstock alkenes are used as bridges between photogenerated alkyl radicals and arenes, opening a route to γ-aryl-carbonyls for chemo-divergent access to aryltetralone and γ-lactones, a gateway to 2,7′-cyclolignans.
NGADJUI, BONAVENTURE T.;LONTSI, DAVID;AYAFOR, JOHNSON FOYERE;SONDENGAM, B+, PHYTOCHEMISTRY, 28,(1989) N 1, C. 231-234
作者:NGADJUI, BONAVENTURE T.、LONTSI, DAVID、AYAFOR, JOHNSON FOYERE、SONDENGAM, B+
DOI:——
日期:——
DDQ-Catalyzed Oxidative C(sp<sup>3</sup>)–H Functionalization of Aryltetralins and Subsequent Chemoselective Oxidative Demethylation to Access Dihydronaphthalenes and Dihydronaphthoquinones
Pachypophyllin and pachypostaudins A and B: three bisnorlignans from pachypodanthium staudtii☆
作者:Bonaventure T. Ngadjui、David Lontsi、Johnson Foyere Ayafor、B.Lucas Sondengam
DOI:10.1016/0031-9422(89)85044-7
日期:——
Abstract Three new bisnor lignans, pachypophyllin, pachypostaudin-A and pachypostaudin-B have been isolated from the bark of Pachypodanthiumstaudtii and their structures have been determined by 1 H and 13 CNMR spectroscopy and chemical correlations. 2,4,5-Trimethoxystyrene, probably a precursor of the bisnor lignans, was also isolated from the extracts. Furthermore, the potent antiviral flavonol,