Substituted benzimidazoles and quinazolines as antihypertensives
申请人:American Home Products Corporation
公开号:US05283242A1
公开(公告)日:1994-02-01
There are disclosed compounds of the formula ##STR1## wherein R.sup.1 is ##STR2## R.sup.2 is ##STR3## wherein X is ##STR4## wherein R.sup.5 is hydrogen, alkyl of 1-6 carbon atoms, benzyl, triphenylmethyl, or Sn(alkyl of 1-6 carbon atoms).sub.3 ; n is 1 to 3; Y is ##STR5## wherein R.sup.3 is hydrogen, perfluoro alkyl of 1-6 carbon atoms, trifluoromethylalkyl of 1-6 carbon atoms, or alkyl of 1-6 carbon atoms; and R.sup.4 is hydrogen or alkyl of 1-6 carbon atoms; with the proviso that when R.sup.1 is ##STR6## then R.sup.2 cannot be ##STR7## wherein X is as defined above; and the pharmaceutically acceptable salts thereof, which by virtue of their ability to antagonize angiotensin II are useful for the treatment of hypertension and congestive heart-failure.
A highly efficient method for the preparation of 2-aryl substituted carbapenems exploiting a Pd(0) mediated cross-coupling reaction
作者:Thomas A. Rano、Mark L. Greenlee、Frank P. DiNinno
DOI:10.1016/0040-4039(90)80165-i
日期:1990.1
synthesis of 2-aryl substituted carbapenems via a palladium catalyzed coupling reaction of a vinyl triflate with aryl stannanes is described. Employing Pd2(DBA)3.CHCl3 as the catalyst and tris(2,4,6-trimethoxyphenyl)phosphine as the ligand provides generous yields of the desired β-lactams. Reaction times are brief while reaction temperatures never exceed ambient.
A new synthetic route to in-chain metallopolymers via copper(<scp>i</scp>) catalyzed azide–platinum–acetylide iClick
作者:C. C. Beto、E. D. Holt、Y. Yang、I. Ghiviriga、K. S. Schanze、A. S. Veige
DOI:10.1039/c7cc06289c
日期:——
The first example of an in-chain metallo-poly(triazolate) synthesized by CuAAC is reported. Azido-platinum-acetylide (A-M-B) monomers are catalytically polymerized with copper(I) acetate to yield 1,2,3-triazolate linked Pt(II) units. The metallopolymers are characterized by multinuclear NMR, IR, UV/Vis, GPC, and MS.
preparation of aromatic stannanes from arylhalides (mostly aryl bromides) is presented herein. The reaction proceeds under metal‐ and additive‐free conditions and exhibits a broad substrate scope. The products obtained have been employed in the C‐C bond formation via Stille cross‐coupling reactions. Mechanistic investigation evidenced the key role of both aryl radical and trimethylstannyl radical in