Das, Anupam; Thomas, K. R. Justin published the artcile< Light Promoted Synthesis of Quinoxalines and Imidazo[1,2-a]pyridines via Oxybromination from Alkynes and Alkenes>, Synthetic Route of 20099-90-5, the main research area is quinoxaline preparation green chem; alkyne phenylenediamine photochem heterocyclization; imidazopyridine preparation green chem; alkene aminopyridine photochem heterocyclization.
Light promoted two-step one-pot syntheses of quinoxalines I (R1 = H, Ph; R2 = Me, Cl, CN, etc.) and imidazo[1,2-a]pyridines II (R3 = 4-Me, 2-Br, 4-NO2, etc.) from alkynes 4-R2C6H4CCR1 and alkenes R3C6H4CH=CH2, resp. under mild conditions are described. The conversions occur via the formation of α,α’-dibromo ketones 4-R2C6H4C(O)C(Br)2R1 or α-bromo ketones R3C6H4C(O)CH2Br on irradiation with UV LED fluorescent black light (380-390 nm) in acetonitrile/water mixture This protocol does not require sensitizer or catalyst or additives. This two-step protocol is a new entry of synthetic methods available for quinoxaline derivatives I and imidazopyridine derivatives II and offers wide functional group tolerance.
Asian Journal of Organic Chemistry published new progress about Alkynes, aryl Role: RCT (Reactant), RACT (Reactant or Reagent). 20099-90-5 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO3, Synthetic Route of 20099-90-5.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary