Výsledky vyhledávání - "C. C. Petropoulos"

Synthesis of novel photodegradable poly(o-nitrobenzaldehyde acetal) polymers

Autor: C. C. Petropoulos

Publikováno v: Journal of Polymer Science: Polymer Chemistry Edition. 15:1637-1644

The synthesis of novel photodegradable poly(o-nitrobenzaldehyde acetals) is described. The polymers were prepared by condensing o-nitrobenzaldehyde with a series of glycols. Polyesteracetals can also be prepared by first preparing the o-nitrobenzalde

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb579575b50558a53067fc438a7a04ea
https://doi.org/10.1002/pol.1977.170150712

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Pyranylidene iminium salts II. Iminium salts derived from pyrones, dialkylamides and phosphorus oxychloride

Autor: J. A. Vanallan, George A. Reynolds, C. C. Petropoulos

Publikováno v: Journal of Heterocyclic Chemistry. 6:803-808

N,N-Dialkylamides, pyrones, and phosphorus oxychloride react to give pyranylidene chloroiminium salts. The chlorine atom of these salts is readily displaced by nucleophiles to yield a variety of pyranylidene derivatives.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bc108797bf01295504d5892641537afc
https://doi.org/10.1002/jhet.5570060605

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Reactions of some 4-dicyanomethylenepyran derivatives with malononitrile and hydrazines

Autor: D. P. Maier, C. C. Petropoulos, George A. Reynolds, J. A. Vanallan

Publikováno v: Journal of Heterocyclic Chemistry. 7:1363-1368

4-Dicyanomethylene-2-phenyl-4H-benzo[b]pyran, the corresponding thiapyran, and 4-dicyanomethylene-2,6-diphenyl-4H-pyran react with malononilrile under basic conditions to give 5-amino-4-cyano-2-phenylbenzo[b]pyrano[4,3,2-de] [1,6]naphthyridine, the c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::95eb85f0e0be3002ea2b0cf2dd6affce
https://doi.org/10.1002/jhet.5570070621

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Reactions of some 4-methylene-4H-pyran derivatives with primary and secondary amines

Autor: J. A. Vanallan, C. C. Petropoulos, George A. Reynolds, D. P. Maier

Publikováno v: Journal of Heterocyclic Chemistry. 7:495-507

4-Dicyanomethylene-4H-pyrans react with secondary amines to give 2-aminopyridine and 2-pyridone derivatives which, in turn, have been used to prepare copyrine derivatives. These pyrans and primary amines gave copyrine and iminopyridone derivatives in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4e60c55ef134cd1c3b5b7e2bf9c81f1c
https://doi.org/10.1002/jhet.5570070306

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Reactions of 4-methoxypyrylium salts with secondary amines

Autor: C. C. Petropoulos, George A. Reynolds, J. A. Van Allan

Publikováno v: Journal of Heterocyclic Chemistry. 9:783-787

4-Aminopyrylium derivatives were prepared from secondary amines and 4-methoxy-2,6-dimethylpyrylium perchlorate (1a) and the corresponding 2,6-diphenyl derivative. Excess amine or elevated temperature resulted in the addition of two equivalents of ami

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::def3834e88087c03220c1ca11cf4beba
https://doi.org/10.1002/jhet.5570090404

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Synthesis of some vinyl-substituted pyrylium salts and their intermediates

Autor: C. C. Petropoulos

Publikováno v: Journal of Polymer Science Part A-1: Polymer Chemistry. 10:957-974

The preparation of vinyl-substituted pyrylium salts and their intermediates is described. These monomers and intermediates have been derived from syntheses based on p-2-hydroxyethoxybenzaldehyde and 4-methoxypyrylium salts. Treatment of the hydroxybe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e937216cedf449ae26db9f10209f6e4e
https://doi.org/10.1002/pol.1972.150100401

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The reactions of 4-dicyanomethylene-2-phenyl-4H-1-benzopyran and some benzologs with nucleophiles

Autor: George A. Reynolds, J. A. Vanallan, C. C. Petropoulos

Publikováno v: Journal of Heterocyclic Chemistry. 7:1061-1069

4-Dicyanomethylene-2-phenyl-4H-1-benzopyran (1) reacts with primary amines under mild conditions to give 4-imino-3-alkyl-5-alkylimino-2-phenyl-3,4-dihydro-5H-[1]benzopyrano[3,4-c]-pyridine derivatives which, in turn, are hydrolyzed with acid to 4-imi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77adbf7adc6de0dc2ed3cb5398b41e9e
https://doi.org/10.1002/jhet.5570070510

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High‐sensitivity, high‐resolution, high‐thermal‐resistant negative electron x‐ray resist

Autor: Z. C. H. Tan, F. J. Rauner, C. C. Petropoulos

Publikováno v: Journal of Vacuum Science and Technology. 19:1348-1350

A novel negative‐working electron/x‐ray resist with high sensitivity, high resolution, and good dry etch resistance was obtained by the free radical copolymerization of an unsaturated methacrylate and a hydroxy alkyl methacrylate. Depending on th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::976af140261f149fa094ea8fb4c7fa67
https://doi.org/10.1116/1.571274

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