Naturstoffchemie, 171. Mitt.: Verhalten von Ethyl-(E)-3-(4-brom-3-methylbut-2-enyl)-N-methyl-1,2,3,4-tetrahydro-3-chinolin-2,4(1H,3H)-dion-carboxylat in Anwesenheit von 1,8-Diazabicyclo[5,4,0]undec-7-en (DBU)
作者:Johannes Reisch、Marlies Iding、Ingo von Bassewitz
DOI:10.1007/bf00810034
日期:1993.11
In the presence of pentaisopropylguanidine (PIG) ethyl-(E)-4-[(4-bromo-3-methylbut 2-enyl)-oxy]-N-methyl-3-quinolin-2(1H)-onecarboxylate was converted into diethyl-(E)-4,4'-[(2-methylbut-2-en-1,4-diyl)bis(oxy)]bis[1,2-dihydro-N-methyl-3-quinolin-2(1H)-onecarboxylate]. The reaction of ethyl-(E)-3-(4-bromo-3-methylbut-2-enyl)-N-methyl-1,2,3,4-tetrahydro-3-quinolin-2,4(1H, 3H)-dionecarboxylate and 1,8-diazabicyclo[5,4,0]undec-7-ene (DBU) gave the 2(1H)-quinolone alkaloid (+/-)-Almeine and 2,3,4,5,8,9-hexahydro-12-methyl-1H,7H,11H-azepeino[2',1':2,3]-pyrimido-[1,2-c]-[5,1,3]benzoxadiazocin-11,17(12H)-dione.