Preparation of tert-Butyl 6-Aminopenicillanate and its 6-Oxo and 6-Diazo Derivatives
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چکیده
منابع مشابه
tert-Butyl 6-oxo-2,7-diazaspiro[4.4]nonane-2-carboxylate
In the title mol-ecule, C(12)H(20)N(2)O(3), both five-membered rings are in envelope conformations. In the crystal, N-H⋯O hydrogen bonds link the mol-ecules into chains along [010].
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The asymmetric unit of the title Schiff base compound, C(18)H(27)NO(2), contains two independent mol-ecules in which the C=N bond lengths are 1.278 (2) and 1.280 (2) Å and the cyclo-hexane rings adopt chair conformations. Intra-molecular O-H⋯N hydrogen bonding between hy-droxy and imine groups and weak C-H⋯O hydrogen bonds help to stabilize the mol-ecular structure.
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The title compound, C(24)H(26)O, was prepared by the reaction between 2-tert-butyl-4-methyl-phenol and diphenyl-methanol in the presence of sulfuric acid. Three benzene rings are attached directly to the central C-H group in a twisted propeller conformation with the local pseudo-C(3) rotational axis coinciding with the C-H bond. There are three short C-H⋯O contacts in the molecule.
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Sir: Mitomycin C is a clinically useful antineoplastic antibiotic compound1)2),but its use is limited by side effects, such as severe bone marrowsuppression or gastrointestinal damage. In the hope of obtaining compounds with improved therapeutic properties, a number of derivatives have been prepared. Preparation of new mitomycin analogues have involved substituents on the aziridine ring3'40, an...
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Coggin, J. H., Jr. (The University of Chicago, Chicago, Ill.), and W. R. Martin. 6-Diazo-5-oxo-l-norleucine inhibition of Escherichia coli. J. Bacteriol. 89:1348-1353. 1965.-The glutamine analogue 6-diazo-5-oxo-l-norleucine (DON) induced filaments and spheroplasts in Escherichia coli during the transition of sensitive populations to a state of resistance. Resistance developed at a frequency sug...
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ژورنال
عنوان ژورنال: Journal of Chemical Research
سال: 1999
ISSN: 1747-5198,2047-6507
DOI: 10.1177/174751989902300412