《Microwave-Assisted Tandem Kornblum Oxidation and Biginelli Reaction for the Synthesis of Dihydropyrimidones》 was published in ChemistrySelect in 2020. These research results belong to Malik, Asif A.; Dangroo, Nisar A.; Ara, Tabassum. Recommanded Product: 1-(Bromomethyl)-4-chlorobenzene The article mentions the following:
A simple and straightforward approach for the synthesis of dihydropyrimidones I (X = O, S; Ar = Ph, 4-FC6H4, pyridin-2-yl, 1H-pyrrol-2-yl, etc.) via sequential Kornblum oxidation/Biginelli reaction has been developed. The protocol involves an in situ oxidation of benzyl bromides ArCH2Br which serve as a carbonyl equivalent followed by cyclocondensation with (thio)urea and Et acetoacetate to furnish dihydropyrimidones I under catalyst- and base-free conditions in a one-pot tandem manner under microwave irradiation Further, the product purification using aqueous recrystallization avoids large quantities of volatile and a toxic organic solvent usually required for work-up and significantly less time required for this process makes the method environmentally friendly. The experimental process involved the reaction of 1-(Bromomethyl)-4-chlorobenzene(cas: 622-95-7Recommanded Product: 1-(Bromomethyl)-4-chlorobenzene)
1-(Bromomethyl)-4-chlorobenzene(cas: 622-95-7) undergoes carbonylation in the presence of dimer of chloro(1,5-cyclooctadiene)rhodium(I) to yield the corresponding phenylacetic acid.Recommanded Product: 1-(Bromomethyl)-4-chlorobenzene It can be synthesized by reacting 4-chlorobenzyl alcohol with bromodimethylsulfonium bromide (BDMS) It can also be synthesized by refluxing a mixture of 4-chlorobenzaldehyde, chlorotrimethylsilane, 1,1,3,3-tetramethyldisiloxane and lithium bromide.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics