Naturally occurring quinones. Part XI. The tanshinones
作者:A. C. Baillie、R. H. Thomson
DOI:10.1039/j39680000048
日期:——
dichlorodicyanobenzoquinone yielded tanshinone l (4,5-dihydro-3,9-dimethylphenanthra[1,2-b]furan-4,5-dione). By the same route 5,6,7,8-tetrahydro-8,8-dimethyl-3-phenanthrol was converted into racemic cryptotanshinone (2,3,4,5,6,7,8,9-octahydro-3,9,9-trimethylphenanthra[1,2-b]furan-4,5-dione) which gave tanshinone IIA on dehydrogenation. It is deduced from spectroscopic data that tanshinone IIB is 4,5,6,7,8,9-he
通过合成建立了来自丹参丹参的色素丹参酮I,丹参酮IIA和隐丹参酮的结构。关键步骤是通过与β-氯丙酰过氧化物反应,将2-羟基-1,4-醌转化为二氢呋喃-邻-醌。将8-甲基-3-菲咯啉转化为3-羟基-8-甲基-1,4-菲蒽醌,得到2,3,4,5-四氢-3,9-二甲基菲[1,2- b ]-呋喃-通过与β-氯-α-甲基丙酰过氧化物反应来形成4,5-二酮。随后用二氯二氰基苯并苯醌脱氢得到丹参酮l(4,5-二氢-3,9-二甲基菲[1,2- b]呋喃-4,5-二酮)。通过相同的途径,将5,6,7,8-四氢-8,8-二甲基-3-菲酚转化为外消旋隐丹参酮(2,3,4,5,6,7,8,9-八氢-3,9 ,9-三甲基菲蒽[1,2- b ]呋喃-4,5-二酮)经脱氢得到丹参酮IIA。由光谱数据推断丹参酮IIB为4,5,6,7,8,9-六氢-9-羟甲基-3,9-二甲基菲蒽[1,2 - b ]呋喃-4,5-二酮。