Method for the selection of genetically transformed cells and compounds for use in the method
申请人:SANDOZ LTD.
公开号:EP0530129A1
公开(公告)日:1993-03-03
A method for selecting from a population of cells genetically transformed cells into which a desired nucleotide sequence has been introduced, wherein in the transformed cells the desired nucleotide sequence or a co-introduced nucleotide sequence induces or increases a positive effect of a compound or nutrient supplied to the population of cells, thereby allowing the transformed cells to be identified or selected from non-transformed cells, e.g. for the preparation of genetically transformed plants not containing as a selection marker a non-native nucleotide sequence coding for toxin, antibiotic or herbicide resistance; as well as novel glucuronide compounds, including cytokinin glucuronide compounds, for use in the method.
Process for preparing 2-chloro-1,7-dihydropurin-6-one and a process for
申请人:Boehringer Ingelheim GmbH
公开号:US05264573A1
公开(公告)日:1993-11-23
A process for the preparation of 2-chloro-1,7-dihydropurin-6-one which comprises the steps of: a) suspending 2-thioxanthine in concentrated hydrocloric acid, to produce a suspension; and b) contacting the suspension with chlorine, to produce 2-chloro-1,7-dihydropurin-6-one.