Application of diazene-directed fragment assembly to the total synthesis and stereochemical assignment of (+)-desmethyl-meso-chimonanthine and related heterodimeric alkaloids
作者:Stephen P. Lathrop、Mohammad Movassaghi
DOI:10.1039/c3sc52451e
日期:——
heterodimerization via diazene fragmentation towards the total synthesis of (-)-calycanthidine, meso-chimonanthine, and (+)-desmethyl-meso-chimonanthine. Our syntheses of these alkaloids feature an improved route to C3a-aminocyclotryptamines, an enhanced method for sulfamide synthesis and oxidation, in addition to a late-stage diversification leading to the first enantioselective total synthesis of (+)-des
我们描述了我们的方法学的第一个应用,该方法用于通过二氮烯裂解向(-)-calycanthidine,meso-chimonanthine和(+)-desmethyl-meso-chimonanthine的总合成进行异二聚化。我们的这些生物碱的合成具有改进的制备C3a-氨基环色胺的途径,增强的氨酰胺合成和氧化方法,以及后期的分散化作用,从而导致了第一个对映选择性的全合成(+)-去甲基-间-甲壳基鸟嘌呤及其衍生物。明确的立体化学分配。定向组装异二聚环色胺生物碱的这种通用策略对可控合成具有相关亚结构的高阶衍生物具有广泛的意义。