Synthesis of alkyl 2-aminomethyl-5-(1,2,3-thiadiazol-4-yl)furan-3-carboxylate and pseudopeptides on its basis
摘要:
Cyclization of alkyl 2-methyl-5-acetylfuran-3-carboxylate carbethoxyhydrazone according to Hurd-Mori reaction afforded alkyl 2-methyl-5-(1,2,3-thiadiazol-4-yl)-3-carboxylate. Its bromination with N-bromosuccinimide yielded 2-bromomethyl derivative. The latter was involved in the Delepine reaction to form alkyl 2-aminomethyl-5-(1,2,3-thiadiazol-4-yl)-3-carboxylate. Acylation of the product synthesized with chloroacetyl chloride and subsequent treatment with morpholine or 4-methylpiperidine gave the corresponding pseudopeptides. In the course of these transformations the furylthiadiazole fragment retained its stability.
Synthesis of 2-Substituted 5-(1,2,3-Selenadiazol-4-yl)furan-3-carboxylic Acids Esters
作者:R. Maadadi、L. M. Pevzner、M. L. Petrov
DOI:10.1134/s1070363219100074
日期:2019.10
A series of semicarbazones have been obtained from 2-substituted 5-acetylfurancarboxylic acid esters. When oxidized with selenium dioxide in acetic acid, 5-(1,2,3-selenadiadiazol-4-yl)furan-3-carboxylic acid esters bearing a functional group in position 2 of the furan ring have been formed.
Furylhydroperoxides are accessible by three different methodologies. In the enzymatic approach, lypoxygenase is employed on non lipid-like substrates. Transitionmetalcatalyzedepoxidation of allylic alcohols is strongly dependent on the structure of the involved hydroperoxide.
Asymmetric Synthesis with the Enzyme <i>Coprinus</i> Peroxidase: Kinetic Resolution of Chiral Hydroperoxides and Enantioselective Sulfoxidation
作者:Waldemar Adam、Cordula Mock-Knoblauch、Chantu R. Saha-Möller
DOI:10.1021/jo990201p
日期:1999.6.1
hydroperoxide 1a afforded with CiP enantiomerically enriched hydroperoxide 1a (ee up to 54%) and alcohol 2a (ee up to 40%), as well as ketone 3a (which is also formed simultaneously in all other reactions) and molecular oxygen. Catalase activity was established for CiP with hydrogen peroxide. When arylalkyl sulfides 4 were used as oxygen acceptors, three products, sulfoxides 5, alcohols 2, and hydroperoxides
The reaction of enolates of 1,3-dicarbonyl compounds (1) with 3,4-dibromo-2-butanone (2) afforded hydrofuran derivatives (4) or (5) in the presence of DBU in THF and the reaction was applied to the one-pot synthesis of antitumor naphthofuran natural products (29).
Jaworski, Tadeusz; Mizerski, Tadeusz, Polish Journal of Chemistry, 1981, vol. 55, # 1, p. 47 - 56