The synthesis of pyrrolo[2,3-c][1,2,6]thiadiazine-5-carbonitriles from (4H-1,2,6-thiadiazin-4-ylidene)malononitriles
作者:Andreas S. Kalogirou、Panayiotis A. Koutentis、Maria D. Rikkou
DOI:10.1016/j.tet.2010.01.044
日期:2010.3
[3,5-Bis(dialkylamino)-4H-1,2,6-thiadiazin-4-ylidene]propanedinitriles 6a-c, react with sodium methoxide or ethoxide to give the corresponding 6-alkoxy-4-dialkylamino substituted pyrrolo[2,3-c][1,2,6]thiadiazine-5-carbonitriles 7a-f in variable yields. These new compounds are fully characterised and two rational mechanisms are proposed for their formation. (C) 2010 Elsevier Ltd. All rights reserved.