开发了一种通过 Ni 催化还原 C-N 偶联反应直接合成N-芳基内酰胺和酰胺与芳基卤和N-氯酰胺的方法。该反应具有条件温和、官能团耐受性好、底物范围广泛(包括药物衍生底物)等优点,并且还为一些生物活性分子的关键合成中间体提供了直接途径,表明该方法的实用性。最后,进行DFT计算以进一步阐明反应机理,发现可能涉及酰胺基。
Compounds of the formula (I): ##STR1## wherein R.sub.1 is hydrogen, lower alkyl, hydroxymethyl or phenyl; R.sub.2 is hydrogen, lower alkyl or an optionally salted or esterified carboxyl group; R.sub.3 is hydrogen, chlorine, optionally substituted alkyl or a conjugating group; and R.sub.4 is a conjugating group, CH.sub.2 OH or CH(OH)CH.sub.3 ; are useful for their .beta.-lactamase inhibitory activity and are also useful in symergistic combinations with penicillins or cephalosporins.
A method for the direct synthesis of N-aryl lactams and amides with arylhalides and N-chloroamides through a Ni-catalyzed reductive C–N coupling reaction has been developed. The reaction features the advantages of mild conditions, good functional group tolerance and broad substrate scope including drug-derived substrates, and also provided direct access to the key synthetic intermediates for some
开发了一种通过 Ni 催化还原 C-N 偶联反应直接合成N-芳基内酰胺和酰胺与芳基卤和N-氯酰胺的方法。该反应具有条件温和、官能团耐受性好、底物范围广泛(包括药物衍生底物)等优点,并且还为一些生物活性分子的关键合成中间体提供了直接途径,表明该方法的实用性。最后,进行DFT计算以进一步阐明反应机理,发现可能涉及酰胺基。