Protoberberine ausReissert-Verbindungen, 4. Mitt. Eine neue Synthese des (�)-Alamaridins und des (�)-epi-Alamaridins
摘要:
A novel synthesis of 8-methylisoquino[2,1-b] [2,7]naphthyridinium salts 7 is reported using the intramolecular cyclization of the 1-substituted isoquinolines 5 as the key step, which in turn are obtained by alkylation of the Reissert compounds 1. The salts 7 can be reduced by NaBH4 yielding the 8 alpha- and 8 beta-methylstereomers (+/-)-alamaridine and (+/-)-epi-alamaridine 9c and 11c, respectively.
Protoberberine ausReissert-Verbindungen, 4. Mitt. Eine neue Synthese des (�)-Alamaridins und des (�)-epi-Alamaridins
摘要:
A novel synthesis of 8-methylisoquino[2,1-b] [2,7]naphthyridinium salts 7 is reported using the intramolecular cyclization of the 1-substituted isoquinolines 5 as the key step, which in turn are obtained by alkylation of the Reissert compounds 1. The salts 7 can be reduced by NaBH4 yielding the 8 alpha- and 8 beta-methylstereomers (+/-)-alamaridine and (+/-)-epi-alamaridine 9c and 11c, respectively.
Protoberberine ausReissert-Verbindungen, 4. Mitt. Eine neue Synthese des (�)-Alamaridins und des (�)-epi-Alamaridins
作者:E. Reimann、H. Renz
DOI:10.1007/bf00811089
日期:1994.12
A novel synthesis of 8-methylisoquino[2,1-b] [2,7]naphthyridinium salts 7 is reported using the intramolecular cyclization of the 1-substituted isoquinolines 5 as the key step, which in turn are obtained by alkylation of the Reissert compounds 1. The salts 7 can be reduced by NaBH4 yielding the 8 alpha- and 8 beta-methylstereomers (+/-)-alamaridine and (+/-)-epi-alamaridine 9c and 11c, respectively.