Syntheses of conformationally restricted analogues of an angiotensin II receptor antagonist. General synthetic approach to functionalized imidazo[1,5-a]pyridine derivatives
作者:Branislav Musicki、Jean-Paul Vevert
DOI:10.1016/s0040-4039(00)78550-9
日期:1994.12
Syntheses of two conformationally restricted analogues 3 and 4 of the angiotensin II receptor antagonistst losartan (1) are described. Michael addition of imidazole-5-carboxaldehyde 8 to biphenylpropiolate 7 provides an efficient method for the skeletal construction of imidazo[1,5-alpha]pyridine derivatives.