📜Methyl 5-[2-(2,5-Dimethoxy-2,5-Dihydrofuran-3-yl)Ethyl]-1,4A-Dimethyl-6-Methylidene-Decahydronaphthalene-1-Carboxylate置于盐酸体系中,用 1,4-二氧六环 作为反应溶剂,化学反应 0.5H,以67%的收率获得产物红松内酯
参考文献:Synthetic Transformations Of Higher Terpenoids: Xiv. Synthesis Of Pyrrololabdanoids From Lambertianic Acid
标题:Synthetic Transformations Of Higher Terpenoids: Xiv. Synthesis Of Pyrrololabdanoids From Lambertianic Acid
摘要:Treatment Of Lambertianic Acid Methyl Ester With Lead Tetraacetate Gave Terpenoid 2,5-Diacetoxydihydrofuran Which Reacted With Primary Amines To Yield 3-Terpenyl-Substituted Pyrrol-2(5H)-Ones; The Reaction With Bydrazine Led To The Corresponding Pyridazine Derivative. The Obtained Furanoterpenoids Underwent Oxidative Methoxylation By The Action Of N-Chlorobenzenesulfonamide Or N-Bromosuccinimide In Methanol. 2,5-Dimethoxydihydrofurans Thus Formed Were Smoothly Converted Into 3-Substituted Furan-2(5H)-One In Acid Medium. Hydrogenation Of 2,5-Dimethoxydihydrofurans,Followed By Treatment With Amines,Gave 1,3-Disubstituted Pyrroles.
DOI:10.1134/s1070428006060030