Studies with enaminones: synthesis of new coumarin-3-yl azoles, coumarin-3-yl azines, coumarin-3-yl azoloazines, coumarin-3-yl pyrone and coumarin-2-yl benzo[<i>b</i>]Furans
作者:Fathy Mohamed Abel Aziz El-Taweel、Mohamed Hilmy Elnagdi
DOI:10.1002/jhet.5570380428
日期:2001.7
dithiocarboxylic acid to yield pyranones. The reaction of the enaminone with 3-amino-1H-1,2,4-triazole gives the triazolo[3,4-b]pyrimidine. The enaminone underwent self dimerization on reflux in acetic acid ammonium acetate to yield the coumarinyl pyridines and reacted with ketone under the same conditions to yield the pyridine. The reaction of the enaminone with 1,4-benzoquinone and 1,4-naphthoquinone gives
Abstract An efficient and one-pot procedure is described for the synthesis of a variety of derivatives of 1,2-dihydrobenzo[f]chromen-3-ones and 3,4-dihydrochromen-2-ones undersolvent-freeconditions via a pseudo-four-component domino reaction of acetic anhydride, aryl aldehydes, glycine-based dithiocarbamates, and phenols/naphthols in the presence of l-proline and H4[Si(W3O10)4].xH2O as green catalysts
摘要 描述了一种有效的一锅法,该方法可在无溶剂条件下通过拟-合成方法合成1,2-二氢苯并[ f ]铬n-3-酮和3,4-二氢铬n-2-酮的各种衍生物。在存在乙酸酐,芳基醛,基于甘氨酸的二硫代氨基甲酸酯,和苯酚/萘酚的四组分多米诺反应升-脯氨酸和H 4 [硅(W 3 ö 10)4 ]。x H 2 O作为绿色催化剂。所有产品均按照绿色战略生产,可合成具有优异收率(高达94%)和非对映选择性的相应产品。
Ensembling three multicomponent reactions for the synthesis of a novel category of pseudo-peptides containing dithiocarbamate and N,X-heterocylic groups
Consecutive multicomponentreactions have been applied for the synthesis of novel pseudo-peptides bearing dithiocarbamate and N,X-heterocyclic groups (X = S, O) in only one structure. The first multicomponentreaction includes the synthesis of dithiocarbamates using an amine or amino acid, CS2 and an electrophile. The second MCR is synthesis of Asinger imines using 2-chloroisobutyraldehyde, NaXH (X = S
A novel category of di‐ and tri‐substituted thiazoles were synthesized by the condensation of amino acid‐based dithiocarbamates with various reagents such as anhydrides, acyl halides, benzene sulfonyl chloride, trifluoromethanesulfonic anhydride, chloroethyl formate, and diethyl chlorophosphate.
Novel peptidomimetics containing dithiocarbamate groups were synthesized via the Ugi reaction. Also, dithiocarbamates of natural amino acids were prepared and were used successfully in Ugi reactions to prepare novel peptidomimetics bearing amino acid and dithiocarbamate groups in a single structure. In addition the prepared dithiocarbamates based on amino acids are converted to the corresponding amides