I–-Catalyzed Reaction of 5-Methoxyoxazoles with Organic Iodides – An Efficient Synthesis of Azalactones
作者:Lianghua Lu、Ping Lu、Shengming Ma
DOI:10.1002/ejoc.200600637
日期:2007.2
An I–-catalyzed methoxy carbon–oxygen bond cleavage in 5-methoxyoxazoles leading to the synthesis of azalactones, precursors of quaternary amino acids, has been developed. A series of 4-substituted azalactones were obtained through the variation of the alkyl iodides and differently substituted 5-methoxyoxazoles. Further study indicated that azalactone 3aa may be easily converted to benzoyl-protected
已开发出一种 I-催化的 5-甲氧基恶唑中的甲氧基碳-氧键断裂,从而合成季氨基酸前体氮杂内酯。通过烷基碘和不同取代的5-甲氧基恶唑的变化,得到了一系列4-取代的氮杂内酯。进一步的研究表明,氮杂内酯 3aa 可以很容易地转化为苯甲酰保护的季铵酸 4aa。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)