1381870-57-0Relevant articles and documents
UV Light-mediated regioselective methylsulfanyl discrimination via Pd-catalyzed cross-coupling reactions of 2,4-dimethylsulfanylpyrido[2,3-d]pyrimidines
Riadi, Yassine
, p. 351 - 360 (2019)
An effective and novel photochemical method for the preparation of 2,4-disubstituted pyrido[2,3-d]pyrimidines is reported from 2,4-dimethylsulfanyl-pyrido[2,3-d]pyrimidines through a Liebeskind-Sroglcoupling reaction involving an original selective methyl sulfanyl discrimination using UV light as a source of energy. Our strategies involve a two-step and a one-pot approach with reaction times of 11-18 h and yields ranging between 72 and 94%. The two strategies are compared.
Convenient synthesis of 2,4-disubstituted pyrido[2,3-d]pyrimidines via regioselective palladium-catalyzed reactions
Riadi, Yassine,Massip, Stephane,Leger, Jean-Michel,Jarry, Christian,Lazar, Sa?d,Guillaumet, Gérald
, p. 5018 - 5024 (2012/08/07)
A novel and effective route for the synthesis of 2,4-disubstituted pyrido[2,3-d]pyrimidines III is reported starting from the corresponding 2,4-dichloropyridopyrimidine 1 through regioselective functionalization palladium-catalyzed C-C coupling reactions, by two successive palladium-catalyzed reactions involving an original regioselective chlorine discrimination. Alternatively, type III compounds were elaborated from 2 by C-2 chlorine further displacement of the C-4 isopropylsulfanyl group, which acted as a temporary C-4 protecting group. Further Suzuki-Miyaura cross-coupling reactions led to C-2 and C-4 disubstituted compounds.