在
二异丁基氢化铝 作用下,
以
甲苯 为溶剂,
反应 12.0h,
以68%的产率得到isomalbrancheamide B
参考文献:
名称:
玛支酰胺和玛支酰胺 B 的仿生全合成
摘要:
报道了 malbrancheamide 和 malbrancheamide B 的仿生全合成。两种一氯物质的合成使得 Malbrancheamide B 的结构能够被明确指定。这些合成均以 5-羟基吡嗪-2(1 H )-one 的分子内 Diels-Alder 反应为特征,以构建双环[2.2.2]二氮杂辛烷核心,这也被提议作为这些化合物的生物合成途径。
The disclosure provides biocatalysts that halogenate complex chemical compounds in specific and predictable ways. Also disclosed are halogenated complex organic compounds. The disclosure further provides methods for the halogenation of complex chemical compounds and methods of inhibiting the contraction of smooth muscle in mammals.
Function and Structure of MalA/MalA′, Iterative Halogenases for Late-Stage C–H Functionalization of Indole Alkaloids
作者:Amy E. Fraley、Marc Garcia-Borràs、Ashootosh Tripathi、Dheeraj Khare、Eduardo V. Mercado-Marin、Hong Tran、Qingyun Dan、Gabrielle P. Webb、Katharine R. Watts、Phillip Crews、Richmond Sarpong、Robert M. Williams、Janet L. Smith、K. N. Houk、David H. Sherman
DOI:10.1021/jacs.7b06773
日期:2017.8.30
biological activity. In this study, we characterized the two flavin-dependenthalogenases involved in the late-stage halogenation of malbrancheamide in two different fungal strains. MalA and MalA′ catalyze the iterative dichlorination and monobromination of the free substrate premalbrancheamide as the final steps in the malbrancheamide biosynthetic pathway. Two unnatural bromo-chloro-malbrancheamide analogues
Biomimetic Total Synthesis of Malbrancheamide and Malbrancheamide B
作者:Kenneth A. Miller、Timothy R. Welch、Thomas J. Greshock、Yousong Ding、David H. Sherman、Robert M. Williams
DOI:10.1021/jo800116y
日期:2008.4.1
The biomimetic total syntheses of both malbrancheamide and malbrancheamide B are reported. The synthesis of the two monochloro species enabled the structure of malbrancheamide B to be unambiguously assigned. The syntheses each feature an intramolecular Diels−Alder reaction of a 5-hydroxypyrazin-2(1H)-one to construct the bicyclo[2.2.2]diazaoctane core, which has also been proposed as the biosynthetic
报道了 malbrancheamide 和 malbrancheamide B 的仿生全合成。两种一氯物质的合成使得 Malbrancheamide B 的结构能够被明确指定。这些合成均以 5-羟基吡嗪-2(1 H )-one 的分子内 Diels-Alder 反应为特征,以构建双环[2.2.2]二氮杂辛烷核心,这也被提议作为这些化合物的生物合成途径。