A Novel Synthesis of a 1,3-Disubstituted 1,3-Dihydro-2H-imidazo[4,5-b]pyridin-2-one. Application to GW808990 a CRF1 Receptor Antagonist
作者:Jerome F. Hayes、Matthew E. Popkin
DOI:10.3987/com-10-s(e)62
日期:——
A novel synthesis of a 1,3-disubstituted 1,3-dihydro-2H-imidazo-[4,5-b]pyridin-2-one has been achieved by condensation of iminohydantoin 3 with t-butyl acetoacetate in diglyme at 160 °C. Hydrogenation of the product in the presence of 4-heptanone followed by a Buchwald-Hartwig amination afforded GW808990, a CRF 1 receptor antagonist.
通过亚氨基乙内酰脲 3 与乙酰乙酸叔丁酯在二甘醇二甲醚中 160° 缩合,实现了 1,3-二取代 1,3-二氢-2H-咪唑并-[4,5-b]吡啶-2-酮的新合成C。在 4-庚酮存在下对产物进行氢化,然后进行 Buchwald-Hartwig 胺化,得到 GW808990,一种 CRF 1 受体拮抗剂。