作者:Thomas L. Gilchrist、Américo Lemos
DOI:10.1016/s0040-4020(01)90377-1
日期:1992.9
The pyrrolizidin-3-ones 5, 7 and 10 have been prepared from pyrrole by making use of its reaction with ethyl bromopyruvate oxime in the presence of sodium carbonate to introduce the side chain. The 5-substituents were introduced into the pyrrole ester 2 before hydrolysis and dehydrative cyclization. The X-ray crystal structure of compound 10 has been determined and this shows that the C3 to N4 bond
所述pyrrolizidin -3-酮5,7和10已经从吡咯通过利用其与溴丙酮酸乙酯肟在碳酸钠的存在下引入侧链的反应制备。在水解和脱水环化之前,将5-取代基引入吡咯酯2中。已经确定了化合物10的X射线晶体结构,这表明C 3-4至N 1-4键不再像普通的叔酰胺中那样,正如其他N-酰化的唑所观察到的那样。