Abstract
The ketene aminals 9a–e can be prepared from the orthoamide of propiolic acid 6a and 2-methyl-5-phenacyl-1,3,4-thiadiazoles 8a–e under mild conditions. The crystal structure analyses of 9b and 9d reveal that compounds 9 can be regarded as 1,4-dipoles (push-pull-substituted butadienes). Surprisingly, the analogous reactions of the orthoamides 6b,c with the thiadiazoles 8a–c give rise to the formation of 1,2-dihydro-pyridin-2-thiones 13a–j. The constitution of the compounds 13 was confirmed by crystal structure analyses of the compounds 13c,f,g,i.
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Articles in the same Issue
- Frontmatter
- In this Issue
- NQR, NMR, and X-ray crystal structure studies of [4-C2H5-C6H4NH3]2MBr4 (M=Zn, Cd)
- Ein ökonomisches Verfahren zur Aufarbeitung von Reaktionsgemischen bei Lewis-Säure-induzierten elektrophilen Aromatensubstitutionen
- Orthoamide und Iminiumsalze, XCIVa. Kondensationsreaktion von Orthoamiden von Alkincarbonsäuren mit 2-Methyl-5-phenacyl-1,3,4-thiadiazolen
- Highly effectual synthesis of 4,6-diarylpyrimidin-2(1H)-ones using N,N,N′,N′-tetramethylethylenediaminium-N,N′-disulfonic acid hydrogen sulfate as a dual-functional catalyst
- Efficient synthesis of pyrido[2,3-d]pyrimidine-7-carboxylic acids catalyzed by a TiO2/SiO2 nanocomposite in aqueous media at room temperature
- Synthesis, characterization, and antitumor activity of some novel S-functionalized benzo[d]thiazole-2-thiol derivatives; regioselective coupling to the –SH group
- A zinc(II) coordination polymer containing single- and double-stranded helical chains: synthesis, crystal structure, and thermal and luminescence properties
- An unexpected lanthanum chloride carbonate hydrate: synthesis, crystal structure, vibrational spectra and thermal degradation of LaCl[CO3]·3H2O
- Structures of the diiodine adducts of bis(diisopropylphosphano)methane disulfide and bis(diisopropylphosphano)ethane disulfide
- Note
- Photoluminescence of Baltic amber
Articles in the same Issue
- Frontmatter
- In this Issue
- NQR, NMR, and X-ray crystal structure studies of [4-C2H5-C6H4NH3]2MBr4 (M=Zn, Cd)
- Ein ökonomisches Verfahren zur Aufarbeitung von Reaktionsgemischen bei Lewis-Säure-induzierten elektrophilen Aromatensubstitutionen
- Orthoamide und Iminiumsalze, XCIVa. Kondensationsreaktion von Orthoamiden von Alkincarbonsäuren mit 2-Methyl-5-phenacyl-1,3,4-thiadiazolen
- Highly effectual synthesis of 4,6-diarylpyrimidin-2(1H)-ones using N,N,N′,N′-tetramethylethylenediaminium-N,N′-disulfonic acid hydrogen sulfate as a dual-functional catalyst
- Efficient synthesis of pyrido[2,3-d]pyrimidine-7-carboxylic acids catalyzed by a TiO2/SiO2 nanocomposite in aqueous media at room temperature
- Synthesis, characterization, and antitumor activity of some novel S-functionalized benzo[d]thiazole-2-thiol derivatives; regioselective coupling to the –SH group
- A zinc(II) coordination polymer containing single- and double-stranded helical chains: synthesis, crystal structure, and thermal and luminescence properties
- An unexpected lanthanum chloride carbonate hydrate: synthesis, crystal structure, vibrational spectra and thermal degradation of LaCl[CO3]·3H2O
- Structures of the diiodine adducts of bis(diisopropylphosphano)methane disulfide and bis(diisopropylphosphano)ethane disulfide
- Note
- Photoluminescence of Baltic amber