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Method for the conversion of cephalomannine to taxol and for the preparation of n-acyl analogs of taxol
(United States Patent and Trademark Office, 1995-11-28)
The natural product cephalomannine can be converted to the important anticancer natural product taxol by a simple process involving the steps of dihydroxylation to give cephalomannine-diols, diol cleavage, benzoylation at ...
Synthesis of sphingosines
(United States Patent and Trademark Office, 1996-01-30)
Provided by the present invention is a process for the biocatalytic synthesis of optically pure sphingosines from achiral starting material. The stereoisomers of sphingosine are prepared from chiral arene diols using ...
Synthesis of sphingosines
(United States Patent and Trademark Office, 1996-01-30)
Provided by the present invention is a process for the biocatalytic synthesis of optically pure sphingosines from achiral starting material. The stereoisomers of sphingosine are prepared from chiral arene diols using ...
Metalorganic chemical vapor deposition of layered structure oxides
(United States Patent and Trademark Office, 1995-12-26)
A method of fabricating high quality layered structure oxide ferroelectric thin films. The deposition process is a chemical vapor deposition process involving chemical reaction between volatile metal organic compounds of ...
Wide scanning spherical antenna
(United States Patent and Trademark Office, 1995-10-17)
A novel method for calculating the surface shapes for subreflectors in a suboptic assembly of a tri-reflector spherical antenna system is introduced, modeled from a generalization of Galindo-Israel's method of solving ...
Zero-current transition PWM converters
(United States Patent and Trademark Office, 1996-01-23)
A zero-current transition pulse-width modulated (ZCT-PWM) d.c.-d.c. converter allows minority-carrier semiconductor devices such as, for example, bipolar junction transistors (BJTs), insulated gate bipolar transistors ...
Method of forming multilayered electrodes for ferroelectric devices consisting of conductive layers and interlayers formed by chemical reaction
(United States Patent and Trademark Office, 1996-02-13)
A ferroelectric device is constructed using a bottom electrode composed of a conducting oxide such as RuO.sub.x, on a substrate such as silicon or silicon dioxide. A ferroelectric material such as lead zirconate titanate ...
Dry etching of layer structure oxides
(United States Patent and Trademark Office, 1999-02-23)
A method of patterning layered structure oxide thin films involving placing the layered structure thin film (with or without a mask) laid on a substrate into a chamber which is partially filled with CHC1FCF.sub.3 gas and ...
7-deoxy-6-substituted paclitaxels
(United States Patent and Trademark Office, 1998-06-30)
The present invention concerns novel paclitaxel derivatives, their use as antitumor agents, and pharmaceutical formulations.
Compositions and methods for controlling pest insects
(United States Patent and Trademark Office, 1998-06-23)
Compositions of a purine, a xanthine oxidase inhibitor and/or a dihydrofolate reductase inhibitor, and methods of using same, for controlling the growth of pest insects which salvage, store, or excrete their nitrogenous ...