Okawara, Tadashi published the artcileConvenient syntheses of cyclic carboxamides from α,β,γ,δ and ε-halocarboxamides under phase transfer conditions, COA of Formula: C3H3Br2ClO, the publication is Chemical & Pharmaceutical Bulletin (1982), 30(4), 1225-33, database is CAplus.
Piperazine-2,5-diones I (R = H, Me; R1 = PhCH2, Ph) were prepared by N-alkylation between two mols. of α-halocarboxamides RCHXCONHR1 (same R, R1; X = Cl, Br) in the presence of a phase transfer catalyst in yields of 64-88%. II (R=H, Me; R1=H, Me, Br; R2=Ph, PhCH2), III (Q= CH2CH2, o-, m-, and p-phenylene, p-C6H4SO2C6H4–p), IV (R= H, Me; R1= PhCH2, Ph; n=1,2,3) were similarly synthesized by intramol. N-alkylation of the corresponding halocarboxamides under phase transfer conditions in 53-99 % yields.
Chemical & Pharmaceutical Bulletin published new progress about 18791-02-1. 18791-02-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is 2,3-Dibromopropionylchloride, and the molecular formula is C3H3Br2ClO, COA of Formula: C3H3Br2ClO.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics