A new method for the preparation of pyrimidines by condensation of β-dicarbonyl compounds, ammonium salts and carbonyl containing substances has been developed.
Manganese‐Catalyzed Multicomponent Synthesis of Pyrimidines from Alcohols and Amidines
作者:Nicklas Deibl、Rhett Kempe
DOI:10.1002/anie.201611318
日期:2017.2
and C−N bond formations. β‐Alkylation reactions are used to multiply alkylate secondaryalcohols with two different primary alcohols to synthesize fully substituted pyrimidines in a one‐pot process. Our PN5P‐Mn‐pincer complexes efficiently catalyze this multicomponent process. A comparison of our manganese catalysts with related cobalt catalysts indicates that manganese shows a reactivity similar to
A FeCl2-catalyzed homocoupling of α,β-unsaturated ketoximes in batch and flow is reported. This protocol demonstrates broad substrate scope and functional group tolerance, providing an alternate route toward the synthesis of 2,4,6-trisubstituted pyrimidines under mild conditions. Also a gram-scale reaction has been performed to evaluate the applicability of this method.
Acid-controlled multicomponent selective synthesis of 2,4,6-triaryl pyridines and pyrimidines by using hexamethyldisilazane as a nitrogen source under microwave irradiation
作者:Chieh-Kai Chan、Yi-Hsiu Chung、Cheng-Chung Wang
DOI:10.1039/d2ra04739j
日期:——
protocol for the synthesis of functionalized 2,4,6-triaryl pyridines and pyrimidines was developed from commercially available aromatic ketones, aldehydes and hexamethyldisilazane (HMDS) as a nitrogen source undermicrowave irradiation. In this multicomponent synthetic route, Lewis acids play an important role in selectively synthesizing six-membered heterocycles, including pyridines (1N) and pyrimidines