have developed a novel synthetic route to nitrogen-containing heterocycles via radical addition–ionic cyclization reaction. Treatment of oxime ethers carrying the tosyloxy group with Et3B and alkyl iodide in the presence of Lewis acid gave the substituted pyrrolidines and piperidines. The reaction of oxime ethers carrying the methoxycarbonyl group proceeded under the same conditions to give the amino
1-N-alkylcarboxy-benzofused lactams useful as antihypertensive agents
申请人:Merck & Co., Inc.
公开号:EP0107095A1
公开(公告)日:1984-05-02
Compounds of the formula:
wherein:
R' is, e.g., hydrogen or alkyl of from 1 to 12 carbon atoms;
R2 and R4 are independently, e.g., hydroxy or loweralkoxy;
m is 1-4; R' is
n is 2-5; provided that where n = 3 or 4, the carbon chain may be unsaturated between carbons 2-3 for n = 3, and between carbons 2-3 or 3-4 or both for n = 4;
the Ra'S are independently, e.g., hydrogen or hydroxy; and
the Rb's are independently hydrogen or loweralkyl;
R5 is hydrogen; halo; hydroxy; loweralkyl; loweralkoxy; amino; or mono- or diloweralkylamino; and a pharmaceutically acceptable salt thereof. Those compounds are inhibotors of angiotensin I converting enzyme useful as antihypertensive agents.
式中的化合物:
式中
R'是氢或 1 至 12 个碳原子的烷基;
R2 和 R4 独立地为羟基或低级烷氧基;
m 是 1-4; R' 是
n 为 2-5;但当 n = 3 或 4 时,碳链在 n = 3 时,碳原子 2-3 之间可以是不饱和的,在 n = 4 时,碳原子 2-3 或 3-4 之间或两者之间可以是不饱和的;
Ra'S独立为氢或羟基等;以及
Rb 独立为氢或低级烷基;
R5 是氢;卤代;羟基;低级烷基;低级烷氧基;氨基;或单或稀低级烷基氨基;及其药学上可接受的盐。这些化合物是血管紧张素 I 转换酶的抑制剂,可用作降压药。
Vechorkin, Oleg; Hu, Xile, Angewandte Chemie - International Edition, 2009, vol. 48, p. 2937 - 2940