作者:Peter R. Ashton、John P. Mathias、J. Fraser Stoddart
DOI:10.1055/s-1993-25835
日期:——
The synthesis of the undecacene derivatives rel-(1R, 4S, 6R, 6aR, 8S, 10S, 11aR, 12R, 14S, 17R, 19S, 19aS, 21R, 23R, 24aS, 25S)-1,4 : 6,25 : 8,23 : 10,21 : 12,19 : 14,17-hexaepoxy-1,4,6,6a.7,8, 10,11,11a,12,14,17,19,19a,20,21,23,24,24a, 25-eicosahydroundecacene (6) and rel-(1R, 4S, 6S, 6aS, 8R, 10R, 11aS, 12S, 14S, 17R, 19R, 19aR, 21S, 23S, 24aR, 25R)-1,4 : 6,25 : 8,23 : 10,21 : 12,19 :14,17-hexaepoxy-1,4,6,6a,7,8,10,11,11a,12,14,17,19,19a,20,21,23,24,24a, 25-eicosahydroundecacene (7) are reported. The initial stages of a reaction sequence in which thermally-promoted and high pressure-promoted cycloadditions between the anti-bisdienophile 1a and the bisdiene 4 are used alternately to obtain the polyacene derivatives rel-(1R, 4S, 5aS, 6S, 8S, 8aS, 10S, 13R, 14aR, 15R, 17R, 17aR)-1,4 : 6,17 : 8,15 : 10,13-tetraepoxy-1,4,5,5a,6,8,8a,9,10,13,14,14a,15,17,17a,18-hexadecahydro-2,3,10,11-tetramethylideneheptacene (8) and rel-(1R, 4S, 6S, 6aS, 8S, 9aR, 10R, 12R, 12aR, 14S, 15aS, 16S, 18S, 21R, 23R, 23aR, 25R, 26aS, 27S, 29S, 29aS, 31R, 32aR, 33R)-1,4 : 6,33 : 8,31 : 10,29 : 12,27 : 14,25 : 16,23 : 18,21-octaepoxy-1,4,6,6a,7,8,9,9a, 10,12, 12a,13,14,15,15a,16,18,21,23,23a,24,25,26,26a,27,29,29a,30,31,32,32a,33-dotriacontahydropentadecacene (9) with complete oligoselectivity and treble diastereoselectivity in each step are described.
十一碳烯衍生物 rel-(1R, 4S, 6R, 6aR, 8S, 10S, 11aR, 12R, 14S, 17R, 19S, 19aS, 21R, 23R, 24aS, 25S)-1,4 : 6,25 : 8,23 : 10,21 : 12,19 : 14,17-hexaepoxy-1,4,6,6a.7,8、10,11,11a,12,14,17,19,19a,20,21,23,24,24a,25-二十氢环十 烯 (6) 和 rel-(1R,4S,6S,6aS,8R,10R,11aS,12S,14S,17R,19R,19aR,21S,23S,24aR,25R)-1,4 :6,25:8,23:10,21:12,19:14,17-六环氧-1,4,6,6a,7,8,10,11,11a,12,14,17,19,19a,20,21,23,24,24a,25-二十碳四氢环癸烯 (7)。在反应序列的初始阶段,反二烯烃 1a 和双二烯 4 之间交替使用热促进和高压促进的环加成反应,以获得聚乙炔衍生物 rel-(1R, 4S, 5aS, 6S, 8S, 8aS, 10S, 13R, 14aR, 15R, 17R, 17aR)-1,4 :6,17 : 8,15 : 10,13-tetraepoxy-1,4,5,5a,6,8,8a,9,10,13,14,14a,15,17,17a,18-hexadecahydro-2,3,10,11-tetramethylideneheptacene (8) and rel-(1R,4S,6S,6aS,8S,9aR,10R,12R,12aR,14S,15aS,16S,18S,21R,23R,23aR,25R,26aS,27S,29S,29aS,31R,32aR,33R)-1,4 :6,33 : 8,31 : 10,29 : 12,27 :描述了 21-八环氧-1,4,6,6a,7,8,9,9a,10,12,12a,13,14,15,15a,16,18,21,23,23a,24,25,26,26a,27,29,29a,30,31,32,32a,33-dotriacontahydropentadecacene (9),每一步都具有完全的寡选择性和三重非对映选择性。