A cyclative cleavage approach to solid-phase synthesis of annulated pyrimidinones using Baylis–Hillman derivatives
作者:R. Pathak、A.K. Roy、S. Kanojiya、S. Batra
DOI:10.1016/j.tetlet.2005.06.018
日期:2005.8
An efficient and robust solid-phase synthesis of 6-substituted-2,5,6,8-tetrahydro-3H-imidazo[1,2-a]pyrimidin-7-ones, 3-substituted-1,3,4,6,7,8-hexahydro-pyrimido[1,2-a]pyrimidin-2-ones and 3-substituted-3,4,6,7,8,9-hexahydro-1H-pyrimido[1,2-a][1,3] diazepin-2-ones from the acetates of Baylis–Hillman adducts employing Michael addition of diamines followed by intramolecular cyclization with cyanogen
一种高效且稳定的固相合成方法,该方法可有效合成6-取代的2,5,6,8-四氢-3 H-咪唑并[1,2- a ]嘧啶-7-酮,3-取代的1,3,4, 6,7,8-六氢嘧啶[1,2- a ]嘧啶-2-酮和3-取代的3,4,6,7,8,9-六氢-1 H-嘧啶[1,2- a来自Baylis-Hillman加合物的乙酸盐的[1,3] diazepin-2-ones采用迈克尔加成的二胺,然后用溴化氰进行分子内环化,最后开发了碱促进的环解反应。该程序通过自动并行合成3 H-咪唑并[1,2- a ]嘧啶-7-one系列14种化合物的小型文库进行验证。