Synthesis of Six-Membered Compounds by Environmentally Friendly Cyclization Using Indirect Electrolysis
作者:Masataka Ihara、Akira Katsumata、Fumihito Setsu、Yuji Tokunaga、Keiichiro Fukumoto
DOI:10.1021/jo951653e
日期:1996.1.1
[Ni(cyclam)](ClO4)(2)-catalyzed indirect electroreduction of olefinic bromides produced six-membered compounds in low to high yields. The synthetic intermediate 49 of Ipecac and Corynanthe alkaloids was obtained in 88% yield in a highly stereoselective manner. Lactam 66, the synthetic precursor of tacamonine, was prepared in 49% yield as a mixture of two diastereoisomers. The electrolysis of the bromoacetates gave the debrominated compounds in good yields.