Protoberberine ausReissert-Verbindungen, 5. Mitt.: Synthese des (�)-Bharatamins
摘要:
Alkylation of the Reissert compound 1 by methyl 2-bromomethylbenzoate (2) followed by spontaneous intramolecular cyclization affords dibenzo[a, g]quinolizinone 4 which in turn can be reduced to benzyl ether 5 by LiAlH4/NaBH4. Debenzylation of 5 by ethanolic HCl furnishes the title compound 6 in improved total yield.
Protoberberine ausReissert-Verbindungen, 5. Mitt.: Synthese des (�)-Bharatamins
摘要:
Alkylation of the Reissert compound 1 by methyl 2-bromomethylbenzoate (2) followed by spontaneous intramolecular cyclization affords dibenzo[a, g]quinolizinone 4 which in turn can be reduced to benzyl ether 5 by LiAlH4/NaBH4. Debenzylation of 5 by ethanolic HCl furnishes the title compound 6 in improved total yield.
Protoberberine ausReissert-Verbindungen, 5. Mitt.: Synthese des (�)-Bharatamins
作者:E. Reimann、H. Renz、W. Dammertz、T. Scholz
DOI:10.1007/bf00807398
日期:1996.2
Alkylation of the Reissert compound 1 by methyl 2-bromomethylbenzoate (2) followed by spontaneous intramolecular cyclization affords dibenzo[a, g]quinolizinone 4 which in turn can be reduced to benzyl ether 5 by LiAlH4/NaBH4. Debenzylation of 5 by ethanolic HCl furnishes the title compound 6 in improved total yield.