70380-51-7Relevant articles and documents
Preparation method of anagrelide impurities B
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Paragraph 0057; 0058; 0059, (2018/05/01)
The invention discloses a preparation method of anagrelide impurities B. The structure of the anagrelide impurities B is shown in formula I as shown in specification, and is obtained by nitratlon reaction, reduction reaction, halogenating reaction, conden
Alkyl 5,6-dichloro-3,4-dihydro-2(1H)-iminoquinazoline-3-acetate hydrohalides
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, (2008/06/13)
The known blood platelet antiaggregative agent 6,7-dichloro-1,5-dihydroimidazo[2,1-b]quinazolin-2(3H)-one is prepared in high yield via an improved process involving a novel intermediate of the Formula STR1 in which R1 is (lower)alkyl and X is bromo, chloro or iodo. Two processes for the preparation of compounds of the Formula III are disclosed, one of which involves the novel intermediate STR2