Library

Language
Preferred search index
Number of Hits per Page
Default Sort Criterion
Default Sort Ordering
Size of Search History
Default Email Address
Default Export Format
Default Export Encoding
Facet list arrangement
Maximum number of values per filter
Auto Completion
Feed Format
Maximum Number of Items per Feed
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1975-1979  (4)
  • Organic Chemistry  (4)
  • 3,7-Dioxabicyclo[3.3.0]octanes
  • Inorganic Chemistry
  • Ketene acetals, 2-(trimethylsilyl)-
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 628-638 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Nitro Compounds from Tetraalkylammonium NitritesPrimary or secondary bromoalkanes and 2-bromo carbonyl compounds give the nitro derivatives 2, 5 and 7 on reaction with tetraalkylammonium nitrites 1 in dichloromethane or acetonitrile at -50 to 200C. The ratio of nitroalkane and alkyl nitrite (2/3) in the reaction of 1-bromoheptane with the salt 1a in various solvents is investigated. 1,1'-(1,3-Phenylene)dipyrrolidine (6) is a good scavenger for alkyl nitrites.
    Notes: Durch Umsetzung von primären oder sekundären Bromalkanen und 2-Bromcarbonylverbindungen mit Tetraalkylammoniumnitriten 1 in Dichlormethan oder Acetonitril bei -50 bis 200C erhält man die Nitroverbindungen 2, 5 und 7. Das Nitroalkan/Alkylnitrit-Verhältnis (2/3) in verschiedenen Lösungsmitteln wird an der Umsetzung von 1-Bromheptan mit dem Salz 1auntersucht. 1,1'-(1,3-Phenylen)dipyrrolidin (6) eignet sich zum Abfangen der Alkylnitrite 3.
    Additional Material: 9 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1977 (1977), S. 1249-1266 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Reactions of 2-Chloro-1,3-thiazin-4-ones2-Chloro-1,3-thiazin-4-ones 2 and 4 are prepared by cyclization of 2-thiocyanatocarboxylic acid chlorides 1 and 3, respectively, with hydrogen chloride. The compounds 2 and 4 are cyclic, azavinylogous acid chlorides of ambivalent character and react with amines undergoing substitution of chlorine or fragmentation. The structure of the 2-amino-1,3-thiazin-4-ones 9 and 14 and the aromatic character of the 1,3-thiazin-4-ones 2 and of the 1,3-thiazinium salts 18 are investigated.
    Notes: 2-Chlor-1,3-thiazin-4-one 2 und 4 sind durch Cyclisierung von 2-Thiocyanatocarbonsäurechloriden 1 bzw. 3 mit Chlorwasserstoff zugänglich. Sie besitzen als cyclische, azavinyloge Säurechloride ambivalenten Charakter und reagieren mit Aminen unter Substitution des Chlors oder Fragmentierung. Die Struktur der 2-Amino-1,3-thiazin-4-one 9 und 14 sowie der aromatische Charakter der 1,3-Thiazin-4-one 2 und der 1,3-Thiaziniumsalze 18 werden untersucht.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1978 (1978), S. 1937-1945 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Simple Synthesis of Tetraalkylammonium Salts with Functional AnionsTetraalkylammonium tetrafluoroborates react with potassium salts to give corresponding tetraalkylammonium salts 2 with functional anionic groups.  -  Methylation of tertiary amines with methyl chloroformate affords trialkyimethylammonium chlorides 3.
    Notes: Tetraalkylammoniumsalze 2 mit funktionellen anionischen Gruppen erhält man durch Umsetzung von Tetraalkylammonium-tetrafluoroboraten mit entsprechenden Kaliumsalzen.  -  Tertiäre Amine werden von Chlorameisensäure-methylester zu Trialkylmethylammoniumchloriden 3 methyliert.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1978 (1978), S. 1946-1962 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Nitriles with Tetraalkylammonium CyanidesPrimary and secondary alkyl halides, 2-halo carboxylic esters, as well as acyl halides react with tetraalkylammonium cyanides 1a, 1b in polar aprotic and nonpolar solvents to give the nitriles 2-8. 2-Halo ketones form oxiranecarbonitriles 9 under mild conditions. Under more vigorous conditions, especially in presence of tetraethylammonium bromide, 3-oxonitriles 11 are the reaction products. The reactivity of the salts 1a and 1b in different solvents is investigated.
    Notes: Primäre und sekundäre Halogenalkane, 2-Halogencarbonsäureester und Acylhalogenide setzen sich in polar-aprotischen und unpolaren Solventien mit den Tetraalkylammoniumcyaniden 1a und 1b zu den Nitrilen 2-8 um. 2-Halogenketone bilden unter milden Bedingungen 2-Oxirancarbonitrile 9, unter verschärften Reaktionsbedingungen, besonders in Gegenwart von Tetraethylammoniumbromid die 3-Oxonitrile 11.  -  Die Reaktivität der Salze 1a und 1b in verschiedenen Lösungsmitteln wurde untersucht.
    Additional Material: 12 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...