62876-66-8Relevant articles and documents
Tuning a robust system: N,O zinc guanidine catalysts for the ROP of lactide
Sch?fer, Pascal M.,McKeown, Paul,Fuchs, Martin,Rittinghaus, Ruth D.,Hermann, Alina,Henkel, Johanna,Seidel, Sebastian,Roitzheim, Christoph,Ksiazkiewicz, Agnieszka N.,Hoffmann, Alexander,Pich, Andrij,Jones, Matthew D.,Herres-Pawlis, Sonja
, p. 6071 - 6082 (2019/05/17)
Non-toxic, highly active and robust complexes are the holy grail as ideal green catalysts for the polymerisation of biorenewable and biodegradable polylactide. Four new zinc guanidine complexes [ZnCl2(TMG4NMe2asme)], [ZnCl2(TMG5Clasme)], [ZnCl2(TMG5Measme)] and [ZnCl2(TMG5NMe2asme)] with different electron-donating and electron-withdrawing groups on the ligand's aromatic backbone have been synthesised. Ligands are derived from low-cost commercially available compounds and have been converted by a three- or four-step synthesis process into the desired ligand in good yields. The compounds have been fully characterised and tested in the ROP of rac-LA under industrially relevant conditions. The complexes are based on the recently published structure [ZnCl2(TMGasme)] which has shown high activity in the polymerisation of lactide at 150 °C. Different substituents in the para-position of the guanidine moiety significantly increase the polymerisation rate whereas positioning substituents in the meta-position causes no change in the reaction rate. With molecular weights over 71000 g mol-1 being achievable, the best system produces polymers for multiple industrial applications and its polymerisation rate approaches that of Sn(Oct)2. The robust systems are able to polymerise non-purified lactide. The initiation of the polymerisation is suggested to occur due to impurities in the monomer.
DIHYDROOROTATE DEHYDROGENASE AS ANTIFUNGAL DRUG TARGET AND QUINAZOLINONE-BASED INHIBITORS THEREOF
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Page/Page column 10, (2011/07/08)
A method of identifying an antifungal agent which targets a DHODH protein (alias PyrE, dihydroorotate dehydrogenase, EC: 1.3.99.11) of a fungus comprising contacting a candidate substance with a fungal DHODH protein and determining whether the candidate s
PROCESS FOR PRODUCING PHENYLALANINE DERIVATIVE HAVING QUINAZOLINEDIONE SKELETON AND INTERMEDIATE FOR THE SAME
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Page/Page column 14, (2010/02/14)
The present invention provides a method for producing a phenylalanine derivative(s) having a quinazolinedione ring of formula (5), including steps comprising of:reacting an acylphenylalanine derivative(s) of formula (1) with a carbonyl group-introducing r