Consecutive Three-Component Synthesis of Ynones by Decarbonylative Sonogashira Coupling
作者:Eugen Merkul、Thomas Oeser、Thomas J. J. Müller
DOI:10.1002/chem.200900119
日期:2009.5.11
7‐aza‐indoles, or pyrroles with oxalyl chloride and subsequent Pd/Cu‐catalyzed decarbonylative alkynylation with terminal alkynes furnishes alkynones under very mild conditions. 4‐(Indol‐3‐yl)‐, 4‐(7‐aza‐indol‐3‐yl)‐, and 4‐(pyrrol‐2‐yl)‐2‐amino pyrimidines can be readily obtained in a concise two‐step synthesis starting from N‐substituted indoles, 7‐aza‐indoles, or pyrroles (see scheme).
条件温和!通过吲哚,7-氮杂吲哚或吡咯与草酰氯的连续乙氧基化进行脱羰羰基化反应,随后钯/铜催化的末端炔烃脱羰基炔化反应可在非常温和的条件下提供炔基。简明的二个氨基嘧啶可轻松获得4-(吲哚-3-基),4-(7-氮杂吲哚-3-基)和4-(吡咯-2-基)-2-氨基嘧啶从N取代的吲哚,7-氮杂吲哚或吡咯开始的逐步合成(请参见方案)。