A Nozaki−Hiyama−Kishi Ni(II)/Cr(II) Coupling Approach to the Phomactins
作者:Baoyu Mi、Robert E. Maleczka
DOI:10.1021/ol015807q
日期:2001.5.1
[reaction: see text] Through a unified synthetic strategy, appropriately functionalized bicyclic starting materials can be elaborated via Ni(II)/Cr(II) macrocylization to [9.3.1] bicycles. Elaboration of these core structures allows access to phomactin C/D analogues and establishes the first synthetic approach to phomactin A affording an intact octahydrochromene/macrocyclic ring system.
[反应:见正文]通过统一的合成策略,可以通过Ni(II)/ Cr(II)的大环化作用向[9.3.1]自行车加工适当功能化的双环原料。对这些核心结构的详细说明使人们能够使用phomactin C / D类似物,并建立了第一个合成的phomactin A的合成方法,从而提供了一个完整的八氢萘/大环系统。
An intramolecular Diels-Alder approach to the spirotetronic acid subunits of the quartromicins
作者:William R. Roush、David A. Barda
DOI:10.1016/s0040-4039(97)10415-4
日期:1997.12
Three of the four diastereomeric spirotetronates (2, 19 and 24) corresponding to the quartromicins were synthesized by a sequence featuring the intramolecular Diels-Alder reaction of 3. An olefin isomerization pathway accounts for formation of the second most abundant cycloadduct, 16. (C) 1997 Elsevier Science Ltd.