Synthesen in der isochinolinreihe Zum H<scp>OFMANN</scp>'schen Abbau 1-Phenäthylsubstituierter 1,2,3,4-Tetrahydroisochinoline
作者:A. Rheiner、A. Brossi
DOI:10.1002/hlca.19620450728
日期:——
Hofmann exhaustive methylation of the analgesic 1-p-chlorophenethyl-2-methyl-6,7-dimethoxy-1,2,3,4-tetrahydro-isoquinoline (Versidyne = I) leads to 1-dimethylamino-1-(2′-vinyl-4′,5′-dimethoxy-phenyl)-3-(p-chloro-phenyl)-propane (III), the only product formed. Its structure was proved by degradation of the dextrorotatory 1 S enantiomer of Versidyne (Ia) of known absolute configuration, yielding IIIb
镇痛药1-对-氯苯乙基-2-甲基-6,7-二甲氧基-1,2,3,4-四氢-异喹啉(Versidyne = I)的霍夫曼彻底甲基化反应导致1-二甲基氨基-1-(2'-乙烯基-4',5'-二甲氧基-苯基)-3-(对-氯-苯基)-丙烷(III),是唯一形成的产物。通过降解已知绝对构型的Versidyne(Ia)的右旋1 S对映异构体,得到IIIb,即III的左旋1 S对映异构体,证明了其结构。IIIb的氢化得到(-)1 S 1-二甲基氨基-1-(2'-乙基-4',5'-二甲氧基苯基)-3-(对氯苯基)丙烷(IXb)明确的路线。