Total synthesis of (±)-α-lycorane and 4,5-dehydroanhydrolycorine
作者:James H. Rigby、Mary E. Mateo
DOI:10.1016/0040-4020(96)00605-9
日期:1996.8
The total syntheses of (±)-α-lycorane and dehydroanhydrolycorine are described. The key intermediate in both approaches is the hydroindolone 5, prepared from the [1+4] cycloaddition reaction of 1-isocyanatocyclohexene and cyclohexyl isocyanide. Alkylation of 5 with arylbromide 6 afforded 7. Hydrolysis of enamide 7 followed by reduction of the resultant enol yielded 10 as a single diastereomer. Radical-based