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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 2870-2886 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction with Aziridines, XI. Reactions of 1-Acylaziridines with Alkoxides and PhenoxidesThe 1-acylaziridines 1a, c, and d react with alcohols and phenols in the presence of alkoxides to form N-acylated colamine ethers (3, 4a-g, 5, 7a-h, 8). Treatment of 1d with primary alcohols or with phenols in the presence of suitable base concentrations produces the corresponding ethers in good yields, whereas upon treatment of 1d with α-branched alcohols diphenylamine is split from 1d in a side reaction. o-Substituents of the reacting phenols influence the course of the reaction only if they exert an extreme shielding effect. With 1a and c splitting off of aziridine as a side reaction is apparently inevitable, but it can be suppressed somewhat by high concentration of alkoxide in the reaction of 1c. Reaction of 1c with phenol in the presence of catalytic amounts of alkoxide yields the colamine ether 6 in a further side reaction.
    Notes: Die 1-Acylaziridine 1a, c und d bilden mit Alkoholen und Phenolen bei Zusatz von Alkoholat N-acylierte Colaminäther (3, 4a-g, 5, 7a-h, 8). 1d liefert bei geeigneter Basenkonzentration mit primären Alkoholen und mit Phenolen die entsprechenden Äther in guten Ausbeuten, mit α-verzweigten Alkoholen wird in einer Nebenreaktion aus 1d Diphenylamin abgespalten, während o-Substituenten der Phenole nur bei extremer Abschirmwirkung einen Einfluß auf die Produktbildung ausüben. Bei 1a und c ist als Nebenreaktion die Abspaltung von Aziridin anscheinend unvermeidlich, bei der Umsetzung von 1c mit Alkohol jedoch durch hohe Alkoholatkonzentration etwas unterdrückbar. Die Umsetzung von 1c mit Phenol ergibt bei katalytischer Menge Alkoholat in einer weiteren Nebenreaktion den Colaminäther 6.
    Additional Material: 5 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 99 (1966), S. 2556-2565 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Umsetzung von 1-[β-Phenäthyl]-aziridin mit überschüssigem Malonester zum Pyrrolidonderivat 6 läßt sich am günstigsten in unpolarem Medium unter Verwendung von Lithiumhydrid und Lithiumjodid durchführen.
    Additional Material: 2 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 986-987 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 500-510 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction with Aziridines, XII. 1,3-Diacyl-2-pyrrolidone Compounds from 1-Acylaziridines and Alkyl MalonatesReaction of the 1-acylaziridines 1a- f with the sodium salts 2a-c of dialkyl malonates yields the 1-acyl-3-alkoxycarbonyl-2-pyrrolidones 4a-1. I.r. and 1H n.m.r. data are reported.
    Notes: Umsetzung der 1-Acylaziridine 1a-f mit der Natriumsalzen 2a-c von Malonsäure- dialkylestern liefert die 1-Acyl-3-alkoxycarbonyl-2- pyrrolidone 4a-1. IR- und 1H-NMR- Daten werden mitgeteilt.
    Additional Material: 3 Tab.
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  • 5
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Aziridines (Aziranes), 29. N-Acylated or N-Sulfonated Esters of 2-Aminoethylphosphonic Acid by Means of Base Catalyzed Amidoethylation of Diesters of Phosphoric Acid with Activated AziridinesThe sodium salts 2 of diesters of phosphoric acid 1 are amidoethylated at phosphorus with N-acylaziridines 3 or N-sulfonylaziridines 13 under proper reaction conditions at room temperature. In this manner a broad variation of N-acylated or N-sulfonated esters of 2-aminoethylphosphonic acids (5a-u, 15a-i) are obtained, mostly in good yields. 2-Methylated 2-aminoethyl-phosphonic esters are formed selectively in two cases by reaction of 2-methylated activated aziridines.
    Notes: In Form ihrer Natriumsalze 2 lassen sich Phosphorigsäurediester 1 bei Raumtemperatur unter geeigneten Bedingungen mit N-Acylaziridinen 3 oder N-Sulfonylaziridinen 13 am Phosphoratom amidoethylieren. So werden N-acylierte oder N-sulfonierte 2-Aminoethylphosphonsäureester (5a-u, 15a-i) in großer Variationsbreite mit meist guten Ausbeuten erhalten. Ringmethylierte Aziridine führen dabei in zwei Fällen selektiv zu 2-methylierten 2-Aminoethylphosphonsäureestern.
    Additional Material: 8 Tab.
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  • 6
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Aziridines, 301).  -  Synthesis of 2-(Acylimino)pyrrolidines and N-Acylated γ-Aminobutyronitriles by Amidoethylation of Simple Nitriles with N-AcylaziridinesMono- and disubstituted acetonitriles 3a-j in their deprotonated from are amidoethylated at the α-carbon with the N-acylaziridines 5a-d under aprotic conditions. The anionic primary products 6 and 20e, i may undergo a second amidoethylation if derived from a mono-substituted acetonitrile, and they may cyclize followed by migration of the acyl group. Thus, the N-acylated α-substituted γ-aminobutyronitriles 7b-g, i-o, the N,N'-diacylated 1,5-diamino-3-cyanopentanes 15d, f, g and 22e, i, the 2-(acylimino)pyrrolidines 10a-c, e, f, h-j, and the 3-amidoethylated 2-(acylimino)pyrrolidines 16e, f, h, i are obtained. Once, 6 was a second time amidoethylated at the amide nitrogen. In one case, the 3-cyano-2-pyrrolidone 25 was formed by amidoethylation, elimination of Ph2N⊝, and cyclization of the intermediate isocyanate. The cyclization may be prevented by using lithium as gegenion or by using a protic solvent. Base catalyzed solvolysis of an (acylimino)pyrrolidine removes the acyl group if this is ethoxycarbonyl and cleaves the C=N double bond if the acyl group is benzoyl.
    Notes: Mono- und Disubstituierte Acetonitrile 3a-j werden nach Deprotonierung unter aprotischen Bedingungen durch die N-Acylaziridine 5a-d am α-C-Atom amidoethyliert. Die anionischen Primärprodukte 6 und 20e, i können bei monosubstituierten Acetonitrilen (3d-i) einer zweiten Amidoethylierung unterliegen und können allgemein unter Cyclisierung und Acylwanderung weiterreagieren. Dementsprechend erhält man die N-acylierten α-substituierten γ-Aminobutyronitrile 7b-g, i-o, die N,N'-diacylierten 1,5-Diamino-3-cyanpentane 15d, f, g und 22e, i, die 2-(Acylimino)pyrrolidine 10a-c, e, f, h-j und die in 3-Stellung amidoethylierten 2-(Acylimino)pyrrolidine 16e, f, h, i. Einmal wurde 6 am Amidstickstoff ein zweites Mal unter Bildung von 13 amidoethyliert. In einem Falle wurde durch Amidoethylierung, Eliminierung von Ph2N⊝ und Cyclisierung des intermediär gebildeten Isocyanats das 3-Cyan-2-pyrrolidon 25 gebildet. Die Cyclisierung läßt sich verhindern mit Lithium als Gegenion oder durch Verwendung eines protischen Lösungsmittels. Basenkatalysierte Solvolyse eines (Acylimino)pyrrolidins entfernt den Acylrest, wenn dieser Ethoxycarbonyl ist, und spaltet die C=N-Doppelbindung, wenn der Acylrest Benzoyl ist.
    Additional Material: 7 Tab.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 855-857 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The anions 3a-e of the acetonitriles 2a-e cleave the aziridine ring of 1-benzoyl-2,2-dimethylaziridine (1) at the tertiary Catom (abnormal opening) and provide in this way good yields of the 4-(benzoylamino)-3,3-dimethylbutyronitriles 5a-e and of the 2-(benzoylimino)pyrrolidine 7a, respectively. Positional isomers could not be detected.
    Additional Material: 1 Tab.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 2397-2398 
    ISSN: 0009-2940
    Keywords: Nucleophilic ring opening ; Regioselectivity ; Ambident nucleophiles ; Aziridines ; Tryptamine ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions with Aziridines, 52.  -  branched-Chain Tryptamine Compounds from Indolyllithium and Activated AziridinesReaction of indolyllithium 1 with activated aziridines 2 in toluene provides the tryptamines 3 or 4 in good yields.
    Additional Material: 1 Tab.
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  • 9
    ISSN: 0009-2940
    Keywords: Single-electron transfer vs. carbonyl attack ; Tetrahydrobianthracene, disproportionation of ; Radical combination ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Arene Hydrides, 8. - SET vs. Nucleophilic Attack in Reactions of α-Bromoisobutyrophenone with Carbanions. Fragmentation of the Anion of TetrahydrobianthraceneSET is the main reaction pathway between α-bromoisobutyrophenone (1) and the carbanions 7a-j- of diarylmethanes or disubstituted acetonitriles: 7- → 7. + e and e + 1 →→ Br- PhCOCMe.2 (3). Main secondary reactions are dimerization of the radical 7. (to form 6) and further reduction of 3: 7- + 3 → 7. + 4 [enolate of isobutyrophenone (5)]. Occasionally substitution products (9) of 1 are obtained. They are probably formed by combination of 7. with 3 (0% 9e at room temperature, 38% 9e at -65°C). This combination seems to be favored by cation coordination. In the reaction with 7f- (“anthracene hydride”) the dimer 6f (and probably 9f, too) undergoes fragmentation to form anthracene. The epoxide 16, arising from 1 by carbonyl attack, has been found only once with 7a-j-; (1% 16b). In contrast, 16 was the (elusive) main product in the reaction of 1 with the carbanions 7k-n- of monosubstituted acetonitriles. Here, 6 and 9 have been found only once (61, 9n). The elusive 16k-n underwent eliminative ring fission.
    Additional Material: 2 Tab.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 2678-2680 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions with Aziridines, 38. On the Regioselectivity of the Nucleophilic Ring Opening of Activated 2-PhenylaziridinesThe ring of 1-mesyl (1c) and 1-(phenylcarbamoyl)-2-phenylaziridine (1d) is opened between N and C-2 (benzylic effect) by some nucleophiles in high yields.
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