Rhodium-catalyzed diastereoselective synthesis of highly substituted morpholines from nitrogen-tethered allenols
作者:A. Ziyaei Halimehjani、B. Breit
DOI:10.1039/d3cc00151b
日期:——
Rhodium-catalyzed intramolecular cyclization of nitrogen-tethered allenols was investigated for the synthesis of functionalized morpholines. By using this strategy, various N-protected 2,5- and 2,6-disubstituted as well as 2,3,5- and 2,5,6-trisubstituted morpholines were obtained via an atom-economic pathway with high to excellent yields, diastereo- and enantioselectivities (up to 99% yield, up to
研究了铑催化的氮拴联烯醇的分子内环化以合成功能化的吗啉。通过使用该策略,通过原子经济途径获得了各种N保护的 2,5- 和 2,6- 二取代以及 2,3,5- 和 2,5,6- 三取代吗啉,收率高至极佳、非对映选择性和对映选择性(产率高达 99%,高达 >99 : 1 dr 和高达 >99.9 ee)。还研究了合成吗啉在臭氧分解、水合、复分解和环氧化反应中的效用。