An h-1, c-13 and n-15 nmr study of the paal-knorr condensation of acetonylacetone with primary amines
作者:Alan R. Katritzky、Taher I. Yousaf、Ban Chi Chen、Zeng Guang-Zhi
DOI:10.1016/s0040-4020(01)87462-7
日期:1986.1
The reaction of primary amines with acetonylacetone is shown by H-1, C-13 and N-15NMR spectroscopy to proceed to the -substituted -2, 5-dimethylpyrroles the intermediacy of -substituted imines. Increased steric hindrance reduces rates of imine formation and decay.
Efficient synthesis of substituted pyrroles through Pd(OCOCF3)2-catalyzed reaction of 5-hexen-2-one with primary amines
作者:Xi Chen、Meng Yang、Min Zhou
DOI:10.1016/j.tetlet.2016.10.029
日期:2016.11
An efficient and facile Pd(OCOCF3)2-catalyzed one-pot cascade protocol has been developed for the synthesis of multiple substituted pyrroles in good to excellent yields. Unlike the reported method starting from the 2-alkenal-1,3-carbonyl compounds, the process utilizes the less reactive 5-hexen-2-one and the method has great potential as a complement to the current developed methods.