(±)-3-Desoxy-7,8-dihydromorphin((±)-1)与3,5-Dihydroxyphenylessigsäure和3-Methoxyphenäthylaminüberelf isolierte Zwischenstufen totalsynthetisiert。AlsSchlüsselverbindungdiente dabei(±)-N -Formyl-2,4-dihydroxymorphinan-6-on (3)。Das darausübermehrere Zwischenstufen erhaltene(±)-3-Desoxy-6,O -didehydro- 7,8-dihydromorphin(= N -Methyl-4,5a-epoxymorphinan-6-on,12),ergab bei der Reduktion mit Lithiumselectr
Aromatization of 1-Benzyltetrahydroisoquinolines: Racemization of (?)-(S)-(N-nor)-Reticuline
作者:Peter Buchs、Arnold Brossi
DOI:10.1002/hlca.19810640310
日期:1981.4.29
Aromatization in the series of opticallyactive 1-benzyltetrahydroisoquinolines has been accomplished with (—)-(S)−(N-nor)-reticuline (1b) and analogs. Direct catalytic or chemical reduction of the isoquinoline 4 obtained could not be achieved in a practical way but 4 was converted into 1 in three steps (4 8 9 1), in 55% overall yield. Partial O-methylation of the isoquinoline 4 gave the isoquinoline alkaloid