作者:William Carruthers、S. Andrew Cumming
DOI:10.1039/p19830002383
日期:——
Palladium (0)-catalysed cyclisation of 3-acetoxy-1-(4-aminoalkyl) cyclohexenes provides convenient access to the 1-azaspiro [5.5] undecane ring system found in the histrionicotoxins. Hydroboration of the 7-butyl derivative (4; R1= Bun, R2= H) and oxidation of the purified borane adduct with trimethyl-amine oxide afforded N-benzyldepentylperhydrohistrionicotoxin, which was readily converted into (±
3-乙酰氧基-1-(4-氨基烷基)环己烯的钯(0)催化环化提供了对在组织毒素中发现的1-azaspiro [5.5]十一烷环系统的便捷访问。7-丁基衍生物(4; R 1 = Bu n,R 2 = H)的氢硼化和纯化的硼烷加合物与三甲基氧化胺的氧化提供了N-苄基脱戊基过氢组氨酸毒素,其易于通过氢解转化为(±)-去戊基过氢组氨酸毒素。超过钯碳。