Application of Primary Allylamines from Morita-Baylis-Hillman Adducts: Cyanogen Azide Mediated Synthesis of Substituted 5-Aminotetrazoles and Their Attempted Transformation into Tetrazolo[1,5-a]pyrimidinones
作者:Somnath Nag、Subhendu Bhowmik、Harsh M. Gauniyal、Sanjay Batra
DOI:10.1002/ejoc.201000586
日期:2010.8
azide-tetrazole tautomerism. Nevertheless it has been discovered that substituted tetrazolo[1,5-α]pyrimidin-7(4H)-ones could be isolated in pure form from a methanolic solution of the respective 2-azidopyrimidin-4(3H)-ones through crystallization. The structure of tetrazolo[1,5-α]pyrimidin-7(4H)-one was unambiguously assigned by X-ray crystallography. The existence of azide-tetrazole tautomerism in this class
已经开发了通过用丙烯酸酯的 Morita-Baylis-Hillman 醋酸酯的 SN 2 或 SN 2' 反应提供的伯烯丙胺处理叠氮化氰来合成取代的 5-氨基四唑的通用方案。由于叠氮四唑互变异构,这些四唑的碱促进分子内环化提供了高度取代的 2-叠氮嘧啶-4(3H)-酮,而不是预期的四唑并嘧啶酮。然而,已经发现取代的四唑并[1,5-α]嘧啶-7(4H)-酮可以通过结晶从各个2-叠氮嘧啶-4(3H)-酮的甲醇溶液中以纯形式分离。四唑并[1,5-α]嘧啶-7(4H)-one的结构通过X射线晶体学明确指定。