cyclohexylaralkylamines II based on the "soft drug" concept and incorporating an amide function were synthesized. In a preliminary screening, compounds were evaluated for their alpha-adrenolytic activities. Several derivatives, especially N-(cyclohexylphenylmethyl)-2-(cyclohexyl-methylamino)acetamide (3), N-(cyclohexylphenylmethyl)-2-(homoveratrylmethylamino)acetam ide (7), and N-[2-(cyclohexylamino)ethyl]-alpha-
Photoredox Promoted Barbier-Type Reaction of Alkyl Iodides with <i>N</i>-Alkyl and <i>N</i>-Aryl Imines
作者:Anton A. Gladkov、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1021/acs.joc.2c02598
日期:2023.1.20
The reaction of organozinc reagents with unactivated imines is accelerated when performed in the presence of a photocatalyst under blue light irradiation. Coordination between Lewis acidic zinc iodide and the imine is a key factor responsible for the reaction efficiency. The method can be carried out using alkyliodides under Barbier conditions.
A series of twelve 1,4-dihydropyridine derivatives incorporating an alpha-adrenergic moiety in one of the ester chains was synthesized. The compounds were evaluated for their calcium antagonist activities by the inhibition of [3H]nitrendipine binding and, in vitro, on pig coronary artery. Their alpha 1- and alpha 2-adrenolytic effects were assessed from their inhibition of [3H]prazosin and [3H]yohimbine binding and, in vitro, on rat aorta and guinea pig vas deferens. Compounds 6 and 9-11 displayed strong calcium antagonist activities, identical with that of nicardipine. The moderate alpha-adrenolytic properties observed were attributed to the presence of alpha-adrenergic moieties. The four chiral derivatives 6a (R,R), 6b (S,S), 6c (S,R), and 6d (R,S) with an N-methyl-N-(benzodioxanylmethyl)amino group on the ester chain were prepared and tested as done previously. Some structure-activity relationships are discussed.