Chemistry and Biochemistry

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  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 4537947 B2
    Description:

    Aromatic polyimides with various functional end-groups such as –CH.dbd.CH.sub.2, –C.tbd.CH, –CN and –CHO are chain-extended (molecular weight increased) by reacting the functional groups with aromatic bis-dipoles. A representative bis-dipole is 1,4-benzene-dinitrile oxide. These polyimides can be shaped and formed prior to chain extending. The aromatic polyimides appropriate for chain-extending are formed by the reaction of aromatic dianhydrides, aromatic amines and monoamines which conta…

    Date Issued:
    1985-08-27
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Marvin J. Miller, Matthew A. Williams
    Patent Number:
    US 5051502 B2
    Description:

    1-Carbapenam-2-one-3-carboxylic acid and 1-carba-3-hydroxy-3-cephem-4-carboxylic acid and esters thereof are provided by a process comprising a rhodium C.sub.2 -C.sub.10 carboxylate catalyzed cyclization of an ester of a 4-(1-alkoxy- or 1-substituted alkxoy)-2-oxo-4-azetidinyl)-.alpha.-diazo-.beta.-ketobutyric acid and an ester of a 5-(1-alkoxy- or 1-substituted alkoxy-2-oxo-4-azetidinyl)-.alpha.-diazo-.beta.-ketovaleric acid respectively. The process is carried out in an inert organic solven…

    Date Issued:
    1991-09-24
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 4026833 B2
    Description:

    Aromatic polyimides with anhydride end groups are chain-extended (molecular weight increased) by reacting them with aromatic polyisocyanates such as tolylene-2,4-diisocyanate. These polyimides can be shaped and formed prior to chain-extending. Thermally stable, polyimide foams are formed by the reaction. The aromatic polyimides appropriate for chain-extending are formed by the reaction of aromatic diamines with a molar excess of aromatic dianhydrides.

    Date Issued:
    1977-05-31
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Paul Helquist, Carlo Cocito
    Patent Number:
    US 5587475 B2
    Description:

    Derivatized type A virginiamycins having a reactive functionalized side chain, and a process for making the virginiamycin derivatives. The side chain contains a thioether linkage and a reactive group, such as a carboxylate ester or free carboxylic acid group.

    Date Issued:
    1996-12-24
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 3562236 B2
    Description:

    The compounds disclosed herein are acetylenic methacrylates having the formula

    CH2 = C(CH3)COO-Z-C=CH

    wherein Z represents a divalent hydrocarbon radical having at least 2 carbon atoms. Because of their terminal acetylenic radical these compounds are very reactive and capable of producing various acetylenic derivatives. Moreover, the methyl group in the methacrylate portion of the ester gives this compound much greater stability than possessed by the corresponding acrylates. This stability…

    Date Issued:
    1971-02-09
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Bradley D. Smith
    Patent Number:
    US 8389223 B2
    Description:

    Embodiments of the present invention are generally directed to compositions comprising a class of molecular probes for detecting the presence of anionic cell surfaces. Embodiments include compositions that are enriched for these compositions and preparations, particularly preparations suitable for use as laboratory/clinical reagents and diagnostic indicators, either alone or as part of a kit. An embodiment of the invention provides for a highly selective agent useful in the discernment and id…

    Date Issued:
    2013-03-05
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Charles C. Price
    Patent Number:
    US 2866774 B2
    Description:

    This invention relates to rubbery reaction products of organic di-isocyanates and high molecular weight polyglycols which have unusual physical characteristics.

    Date Issued:
    1958-12-30
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Julius A. Nieuwland, Richard R. Vogt
    Patent Number:
    US 1926055 B2
    Description:

    This invention relates to improvements in the process for polymerizing acetylene. More particularly, it relates to improvements in the catalyst used to polymerize acetylene to highly unsaturated nonbenzenoid hydrocarbons.

    Date Issued:
    1933-09-12
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Marvin J. Miller
    Patent Number:
    US 4595532 B2
    Description:

    N-Mono or N-disubstituted methyl-2-azetidinones are provided via cyclization of .beta.-hydroxy or .beta.-halo substituted acid sec-amides wherein the amide nitrogen is substituted with a mono- or di-substituted methyl group having activating substituents. Cyclization of .beta.-hydroxy acid amides is mediated by triphenylphosphine-dialkylazodicarboxylate while cyclization of .beta.-halo acid amides is mediated by strong bases e.g. lithium dialkylamides. E.g. Diethyl amino-protected L-serylamin…

    Date Issued:
    1986-06-17
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 4058505 B2
    Description:

    Aromatic polyimides with amine end groups are chain-extended (molecular weight increased) by reacting them with aromatic di- or tri- anhydrides. The reaction can either be at a temperature above the melting point of the reactants or in solvents for the reactants. The polyimides can be shaped and formed prior to chain-extending.

    Date Issued:
    1977-11-15
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Marvin J. Miller, Jingdan Hu
    Patent Number:
    US 6403623 B2
    Description:

    Method for treating tuberculosis with 2-(2-substituted-phenyl)-2-oxazolines and related 5-membered heterocycles represented by the formula ##STR1## Y.sub.1 is e.g. an ester or amide forming group, and X is O, S, or NH; and pharmaceutically acceptable formulations useful therein are provided. A preferred method comprises administering (S)-benzyl2-[2-(benzyloxy)phenyl]-2-oxazoline-4-carboxylate in a suitable formulation. The compounds of the above formula are prepared by known methods, e.g. the…

    Date Issued:
    2002-06-11
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 4118377 B2
    Description:

    Processes for increasing the molecular weight of bis-maleimides are provided. The bis-maleimides are reacted with certain cyclic dienes to form reversible adducts. These adducts, upon elimination of the cyclic diene, yield an extension of the bis-maleimides to higher molecular weight polymers, ultimately to thermally stable, infusible polymers. The process can be interrupted to yield tractable polymers which are also convertible to cross-linked, infusible products. Modifications of the proces…

    Date Issued:
    1978-10-03
    Record Visibility:
    Public
    Resource Type
    Patent