作者:Maria do Céu Costa、Regina Tavares、William B. Motherwell、Maria João Marcelo Curto
DOI:10.1016/s0040-4039(00)78512-1
日期:1994.11
New processes have been developed which allow the stereoselective syntheses of the ambergris ketals 8α, 13;13,17-diepoxi-14,15-dinorlabdane 1 and 8β,13;13,17-diepoxi-14,15-dinorlabdane 2, through selection of the appropriate catalyst for the δ,ε-epoxycarbonyl rearrangement of the key intermediate 3, which is, in turn, obtained by controlled oxidation of anticopalic acid 6.
新工艺已被开发,其允许的龙涎香缩酮8α的立体选择性合成,13; 13,17-diepoxi -14,15- dinorlabdane 1和8β,13; 13,17-diepoxi -14,15- dinorlabdane 2,通过选择用于关键中间体3的δ,ε-环氧羰基重排的合适催化剂的制备,其又通过抗铜酸6的受控氧化而获得。