l-Proline catalyzed multicomponent reaction of 3,4-dihydro-(2H)-pyran, urea/thiourea, and aldehydes: diastereoselective synthesis of hexahydropyrano pyrimidinones (thiones)
作者:Jyoti Pandey、Namrata Anand、Rama P. Tripathi
DOI:10.1016/j.tet.2009.09.002
日期:2009.11
An organocatalytic multicomponent reaction involving 3,4-dihydro-(2H)-pyran, aromatic aldehydes, and urea/thiourea as substrates and l-proline/TFA as catalyst afforded hexahydropyrano pyrimidinones (thiones) in good yields. The method is simple, economical, and ecofriendly to generate hexahydropyrano pyrimidinones as precursors for many biologically active molecules and fused oxazines (PA-824), the
涉及3,4-二氢-(2 H)-吡喃,芳族醛和脲/硫脲作为底物,1-脯氨酸/ TFA作为催化剂的有机催化多组分反应可得到高产率的六氢吡喃嘧啶酮(硫酮)。该方法简单,经济且环保,可生成六氢吡喃并嘧啶酮类化合物作为许多生物活性分子和结核病化学治疗中的先导分子熔融恶嗪(PA-824)的前体。