Involvement of Diels–Alder reactions in the biosynthesis of secondary natural products: the late stage of the biosynthesis of the phytotoxins solanapyrones
作者:Hideaki Oikawa、Yuichi Suzuki、Kinya Katayama、Akira Naya、Chiaki Sakano、Akitami Ichihara
DOI:10.1039/a807704e
日期:——
in deuterium labelled form and administered to cultures of Alternaria solani. Incorporation of [17,17,18,18,18-2H5]prosolanapyrone I (6b) afforded solanapyrones A (1) labelled at C-17 and C-18 with the expected integration in its 2H NMR spectrum. Subsequently, [2,3,17,18,18,18-2H6]prosolanapyrone II (7a) was incorporated into solanapyrone A labelled, as expected, at C-2, C-3, C-17 and C-18. These results
先进的中间体异丙肾上腺素I(6)和II(7)已以氘标记的形式合成,并用于链霉菌的培养。[17,17,18,18,18-掺入2 ħ 5 ] prosolanapyrone I(图6b),得到solanapyrones A(1)在C-17和C-18标记的在其预期的积分2 H NMR谱。随后,[2,3,17,18,18,18- 2 ħ 6如所预期的那样,将]原萘啶酮II(7a)掺入到在C-2,C-3,C-17和C-18处标记的索兰吡酮A中。这些结果有力地证明了Diels-Alder反应参与茄萘酮的生物合成。这是将二烯-双亲二烯前体完整掺入天然[4 + 2]加合物的第一个例子。