Intramolecular Formal [4 + 2] Cycloaddition of Nitriles with Amides Triggered by TMSOTf/Et3N: Highly Efficient Construction of Pyrrolo[1,2-a]pyrimidin-4(6H)-ones
摘要:
By treatment with TMSOTf/Et3N, N-(2-cyanoarylmethyl)-substituted acrylamides or beta-ketoamides underwent N-addition cascades under mild conditions to afford the corresponding pyrrolo[1,2-a]pyrimidin-4(6H)-ones as the formal [4 + 2] cycloaddition products in high yields.
Synthesis of Tetracyclic Quinazolinones Using a Visible-Light-Promoted Radical Cascade Approach
作者:Yue-Yue Han、Heng Jiang、Ruzhi Wang、Shouyun Yu
DOI:10.1021/acs.joc.6b00869
日期:2016.8.19
A practical approach for the synthesis of tetracyclic pyrroloquinazolines using photoredox strategy has been developed. The visible-light-promoted intramolecular single-electron-transfer (SET) process between photocatalyst and N-(2-iodobenzyl)-N-acylcyanamides is considered to be involved in this transformation. Targeted pyrroloquinazoline derivatives (15 examples) are presented in good isolated yields
Intramolecular Formal [4 + 2] Cycloaddition of Nitriles with Amides Triggered by TMSOTf/Et<sub>3</sub>N: Highly Efficient Construction of Pyrrolo[1,2-<i>a</i>]pyrimidin-4(6<i>H</i>)-ones
作者:Feng Liu、Chaozhong Li
DOI:10.1021/jo900907h
日期:2009.8.7
By treatment with TMSOTf/Et3N, N-(2-cyanoarylmethyl)-substituted acrylamides or beta-ketoamides underwent N-addition cascades under mild conditions to afford the corresponding pyrrolo[1,2-a]pyrimidin-4(6H)-ones as the formal [4 + 2] cycloaddition products in high yields.