Thermische Umwandlung von Penta-2, 4-dienyl-phenyläthern in 4-(Penta-2, 4-dienyl)-phenole; [5s, 5s]-sigmatropische Umlagerungen
作者:Gy. Fráter、H. Schmid
DOI:10.1002/hlca.19700530208
日期:——
trans-Penta-2, 4-dienyl phenyl ether (trans-1), on heating at 186° in a five-fold excess of N, N-diethylaniline, gave via a [3s, 3s] rearrangement 23% of 2-(1-vinyl-allyl)-phenol (2) and via a [5s, 5s] rearrangement 37% of trans-4-(penta-2, 4-dienyl)-phenol (trans-3). The dimeric residue was formed from trans-1 by diene synthesis. By working at high dilution, the formation of dimeric products was kept