Process for Preparing Gemcitabine and Associated Intermediates
申请人:Naddaka Vladimir
公开号:US20070191598A1
公开(公告)日:2007-08-16
The present invention provides processes for preparing novel chemical substances that are useful as intermediates in the preparation of gemcitabine and processes for preparing gemcitabine therewith. Exemplary intermediates include mixtures of D-erythro and D-threo (3R- and 3S-) isomers of 3-(hydroxy)-2,2-difluoro-3-(2,2-dimethyldioxolan-4-yl)propionic acid salts. Also provided is a novel process for selectively isolating the D-erythro and D-threo isomers of the said salts in purities of at least about 95%, and processes of using them for preparing nucleoside analogs such as, e.g., gemcitabine and intermediates and analogs thereof.
PROCESS FOR PREPARING GEMCITABINE AND ASSOCIATED INTERMEDIATES
申请人:NADDAKA Vladimir
公开号:US20090221811A1
公开(公告)日:2009-09-03
The present invention provides processes for preparing intermediates useful in the preparation of gemcitabine and other nucleosides, and processes for preparing gemcitabine therewith. Exemplary intermediates include mixtures of D-erythro and D-threo isomers of 3-(hydroxy)-2,2-difluoro-3-(2,2-dimethyldioxolan-4-yl)-propionic acid salts. Also provided is a process for selectively isolating the D-erythro and D-threo isomers of D-erythro and D-threo isomers of 3-(hydroxy)-2,2-difluoro-3-(2,2-dimethyldioxolan-4-yl)-propionic acid salts, and processes for using such isomers in the preparation of nucleoside analogs such as, e.g., gemcitabine, intermediates thereof, and analogs thereof.
Use of protein spee as a marker for colorectal cancer
申请人:Tacke Michael
公开号:US20060188950A1
公开(公告)日:2006-08-24
The present invention relates to the diagnosis of colorectal cancer. It discloses the use of protein SPEE (sperrnidine synthase) in the diagnosis of colorectal cancer. It relates to a method for diagnosis of colorectal cancer from a liquid sample, derived from an individual by measuring SPEE in said sample. Measurement of SPEE can, e.g., be used in the early detection or diagnosis of colorectal cancer.