Novel C<sub>9</sub>and C<sub>11</sub>Hydrocarbons from the Brown Alga<i>Cutleria multifida</i>; Sigmatropic and Electrocyclic Reactions in Nature. Part VI
作者:Jürgen Keitel、Iris Fischer-Lui、Wilhelm Boland、Dieter G. Müller
DOI:10.1002/hlca.19900730806
日期:1990.12.12
the marine brown alga Cutleria multifida produces trace amounts of the C9H12 hydrocarbon 7-melhylcycloocta-1,3,5-triene (8) and its valence tautomer 7-methylbicyclo[4.2.0]octa-2,4-diene, A second novel C9H12 hydrocarbon is 6-vinyicyclo-hepta-1,4-diene (9), a lower homologue of ectocarpene (5). Among the C11H16 hydrocarbons, 7-((1E/Z)-prop-l-enyl)cycloocta-1,4-diene (10/11) is found for the first time
除了已知的C 11 H 16烃多芬(4),uc蒽(2)和外果皮(5)外,海生褐藻多菌种还产生痕量的C 9 H 12烃7-甲基环辛基1,3, 5-三烯(8)及其价互变异构体7-甲基双环[4.2.0] octa-2,4-二烯,第二种新型C 9 H 12烃是6-乙烯基环庚-1,4-二烯(9),较低的外果皮同源物(5)。在C 11 H 16烃中,7-((1 E /Ž) -丙-1-烯基)环辛-1,4-二烯(10 / 11)被发现首次。所有新产品的结构均已通过合成和光谱数据证实。新烃的生物合成8 - 11显然与这导致主要产物giffordene(途径7),(6小号)-ectocarpene((6-小号) - 5),和(4 - [R,5 - [R )-紫杉烯((4 R,5 R)-2)。某些不耐热的初级产物的连续反应通过 电环闭合,3,3-σ重排或1,7σH移。