Methyl 3-substituted-isoxazole-5- carboxylates syntheses on solid supports via wang resin-bound 2,3-dibromopropionate
作者:Shou-Ri Sheng、Ai-Ying He、Mei-Hong Wei、Ai-Li Zhu、Ming-Zhong Cai
DOI:10.1002/hc.21035
日期:——
A novel Wang resin-bound 2,3-dibromopropionate reagent has been developed and used as a potential dipolarophile for the facile preparation of methyl 3-substituted-isoxazole-5-carboxylates through triethylamine, promoting a sequence of reactions involving the in situ generation of 2-bromoacrylate resin and nitrile oxide, regioselective 1,3-dipolar cycloaddition, and loss of hydrogen bromide in one pot
一种新型 Wang 树脂结合 2,3-二溴丙酸酯试剂已被开发并用作潜在的偶极试剂,用于通过三乙胺轻松制备 3-取代-异恶唑-5-羧酸甲酯,促进一系列反应,包括原位生成2-溴丙烯酸酯树脂和氧化腈,区域选择性1,3-偶极环加成,一锅失去溴化氢,然后用甲醇钠从树脂上裂解。该方法的优点是操作简单,条件温和,收率好,产品纯度高。© 2012 Wiley Periodicals, Inc. 杂原子化学 23:444–448, 2012; 在 wileyonlinelibrary.com 上在线查看这篇文章。DOI 10.1002/hc.21035