Ring closure of 1-[4-(imidazol-1-yl)phenyl]-3-phenyl-2-propen-1-one derivatives to potential biologically active compounds
作者:P. Coudert、J. Couquelet、P. Tronche、F. Leal
DOI:10.1002/jhet.5570300444
日期:1993.7
1 reacted with acetone cyanohydrin, ethyl phenylacetate and cyanoacetamide to give the adducts 2, 8 and 10 respectively. Action of hydrazine hydrate on both the γ-ketonitrile 2 and the corresponding γ-ketoacid 4 led to pyridazine derivatives 3 and 5. 4,5-Dihydropyridazinone 5 was dehydrogenated by the action of bromine in acetic acid to give pyridazinone 6. Cyclization of acid 8 in acetic medium resulted
1- [4-(咪唑-1-基)苯基] -3-苯基-2-丙烯-1-酮1与丙酮氰醇,苯基乙酸乙酯和氰基乙酰胺反应,分别得到加合物2、8和10。水合肼对γ-酮腈2和相应的γ-酮酸4的作用导致哒嗪衍生物3和5。通过溴在乙酸中的作用使4,5-二氢哒嗪酮5脱氢,得到哒嗪酮6。酸8在乙酸介质中的环化反应生成α-吡喃酮9。氰基戊酰胺10用盐酸将其转化为δ-酮酸13,其通过分子内脱水而产生α-吡喃酮14 。在乙酸和乙酸铵的存在下回流10,得到3,4-二氢吡啶酮11,将其脱氢以产生吡啶酮12。