Synthesis and reactivity of pyrrolo[3,2-d][1,3]oxazine-2,4-dione. Access to new pyrrolo[3,2-e][1,4]diazepine-2,5-diones
作者:Jean-Daniel Malcor、Yann Brouillette、Julien Graffion、Kim Spielmann、Nicolas Masurier、Ludovic T. Maillard、Jean Martinez、Vincent Lisowski
DOI:10.1016/j.tet.2014.05.046
日期:2014.8
A convenient synthesis of pyrrolo[3,2-d][1,3]oxazine-2,4-dione 4 is described and its reactivity towards various nucleophiles studied. The regioselective ring opening of anhydride 4 or its N-alkylated analog 25 in the presence of alanine or proline afforded, respectively, imidazolidinedione 22 and N-protected pyrrolo[3,2-e][1,4]diazepines 30 and 31 in a one-pot process. In a last part of this study
描述了一种方便合成吡咯并[3,2- d ] [1,3]恶嗪-2,4-二酮4的方法,并研究了其对各种亲核试剂的反应性。在丙氨酸或脯氨酸存在下,酸酐4或其N-烷基化类似物25的区域选择性开环分别提供了咪唑烷二酮22和N-保护的吡咯并[3,2- e ] [1,4]二氮杂卓30和31。一锅法。在这项研究的最后一部分中,提供了另一种途径来生产八个未保护的吡咯并[3,2- e ] [1,4]二氮杂-2,5-二酮35a – h的文库描述了克服酸酐4的有限反应性的方法。