Enantioselective Synthesis of SNAP-7941: Chiral Dihydropyrimidone Inhibitor of MCH1-R
作者:Jennifer M. Goss、Scott E. Schaus
DOI:10.1021/jo801463j
日期:2008.10.3
alkaloid-catalyzed Mannich reaction of beta-keto esters to acylimines and the second was the chiral phosphoric acid-catalyzed Biginelli reaction. Completion of the synthesis was accomplished via selective urea formation at the N3 position of the dihydropyrimidone with the 3-(4-phenylpiperidin-1-yl)propylamine side chain fragment. The synthesis of SNAP-7921 highlights the utility of asymmetric organocatalytic
通过使用两种有机催化方法实现了 SNAP-7941(一种有效的黑色素浓缩激素受体拮抗剂)的对映选择性合成。用于合成富含对映体的二氢嘧啶酮核的第一种方法是金鸡纳生物碱催化的 β-酮酯曼尼希反应生成酰基亚胺,第二种方法是手性磷酸催化的 Biginelli 反应。通过在具有 3-(4-苯基哌啶-1-基)丙胺侧链片段的二氢嘧啶酮的 N3 位置选择性形成尿素来完成合成。SNAP-7921 的合成突出了不对称有机催化方法在构建一类重要的手性杂环中的实用性。