α-Haloacrylates as acceptors in the [3 + 2] cycloaddition reaction with NaN3: an expedient approach to N-unsubstituted 1,2,3-triazole-4-carboxylates
作者:John Kallikat Augustine、Chandrakantha Boodappa、Srinivasa Venkatachaliah
DOI:10.1039/c3ob42276c
日期:——
An expedient synthesis of N-unsubstituted 1,2,3-triazole-4-carboxylates has been demonstrated through [3 + 2] cycloaddition of sodium azide with α-haloacrylates. The process is highly reliable and exhibits an unusually wide scope with respect to α-fluoro-, α-chloro-, α-bromo-, and α-iodoacrylates. The potential of selected 1,2,3-triazole-4-carboxylates in the preparation of 1,5-dihydro-4H-[1,2,3]-triazolo-[4,5-c]-quinolin-4-one has also been illustrated.
通过叠氮化钠与δ-卤代丙烯酸酯的[3 + 2]环加成,证明了一种 N-未取代的 1,2,3-三唑-4-羧酸盐的便捷合成方法。该工艺非常可靠,而且适用于δ-氟、δ-氯、δ-溴和δ-碘丙烯酸酯的范围异常广泛。此外,还说明了选定的 1,2,3-三唑-4-羧酸盐在制备 1,5-二氢-4H-[1,2,3]-三唑-[4,5-c]-喹啉-4-酮方面的潜力。