Lithiation of 3-(Acylamino)-2-unsubstituted-, 3-(Acylamino)-2-ethyl-, and 3-(Acylamino)-2-propyl-4(3<i>H</i>)-quinazolinones: Convenient Syntheses of More Complex Quinazolinones<sup>1</sup>
作者:Keith Smith、Gamal A. El-Hiti、Mohamed F. Abdel-Megeed、Mohamed A. Abdo
DOI:10.1021/jo950988t
日期:1996.1.1
3-(acetylamino)-2-ethyl-4(3H)-quinazolinones and 3-(pivaloylamino)- and 3-(acetylamino)-2-propyl-4(3H)-quinazolinones are lithiated at the benzylic position with LDA. The lithium reagents so produced also react with a variety of electrophiles to give the corresponding 2-substituted-4(3H)-quinazolinone derivatives in very good yields. However, lithiation of 3-(acylamino)-2-(1-methylethyl)-4(3H)-quinazolinones was unsuccessful