Product Details of 16400-32-1. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1-Bromo-2-pentyne, is researched, Molecular C5H7Br, CAS is 16400-32-1, about Palladium-Catalyzed Decarboxylative Generation and Propargylation of 2-Azaallyl Anions. Author is Tang, Shaojian; Wei, Wenjing; Yin, Dan; Poznik, Michal; Chruma, Jason J..
A palladium-catalyzed decarboxylative propargylation (DcPg) of propargyl 2,2-diphenylglycinate imines was developed for the synthesis of [((diphenylmethylene)amino)alkynyl]arenes (Ph2)C=NCH(Ar)CH2C≡CR [R = Me, Et, TMS; Ar = 4-CNC6H4, 2-BrC6H4, 3-pyridyl, etc.]. In this process, the nature of the propargyl ester and aryl imine components, as well as the catalyst system and solvent had a significant impact on the ratio of desired propargylated products vs. allene and/or diene side products that arose via different modes of C-C bond formation. The resulting propargylated products were transformed readily into useful (Z)-homoallylic amines. Moreover, the regioisomeric diene products could be converted to pharmaceutically-relevant diarylmethyl imines via a two-step Diels-Alder/oxidation process.
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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics