作者:Mikhail F Gordeev、Hon C Hui、Eric M Gordon、Dinesh V Patel
DOI:10.1016/s0040-4039(97)00182-2
日期:1997.3
An efficient solid phase synthesis of chiral quinazolinediones is described. Immobilized amino acid based urea derivatives 3 undergo a racemization-free heterocyclization upon gentle heating in presence of tetramethylguanidine to afford fused pyrimidine-2,4-diones 6, which are smoothly N1-alkylated under mild conditions to produce immobilized quinazolinediones 8. The method is amenable to combinatorial
描述了手性喹唑啉二酮的有效固相合成。固定的氨基酸基尿素衍生物3在四甲基胍的存在下,在温和加热下经历无消旋的杂环化作用,得到稠合的嘧啶-2,4-二酮6,在温和的条件下将其平滑地N 1-烷基化,生成固定的喹唑啉二酮8。该方法适合组合合成,并为结构和化学多样性提供了广阔的范围,如制备稠合噻吩并[2,3-d]嘧啶-2,4-二酮10和带有喹唑啉二酮衍生物11的异羟肟酸酯药效基团所说明的。