Asymmetric conversions of 10-bromo-10,11-dihydroquinines into 8-oxa-1-azabicyclo[4.3.0]nonane derivatives and related compounds
作者:Jacek Thiel、Andrzej Katrusiak
DOI:10.1016/s0957-4166(02)00050-2
日期:2002.2
treatment with acid the alkaloid 10 yields [(4S)-(E)-propenyl)-(2S)-piperidinyl]-6-methoxyquinoline-(αR)-methanol 12. Closure of the oxazolidine ring in 12 gives 14, the 9,9-dimethyl-derivative of 10, with the N(1) configuration inverted. The molecular structures of 10a and 14, determined by X-ray diffraction, show their similar conformations except for the axial (E)-propenyl substituent, disordered in