Solvent free, light induced 1,2-bromine shift reaction of α-bromo ketones
作者:Sejin An、Da Yoon Moon、Bong Ser Park
DOI:10.1016/j.tet.2018.10.015
日期:2018.11
good product selectivity, which can be coined as 1,2-Br shift reaction. The product selectivity increases when the reaction is done in neat or solid state, where only the 1,2-Br shift product is formed in some cases. The reaction is suggested to proceed by CBr bond homolysis to give a radical pair, followed by disproportionation and conjugate addition of HBr to the α,β-unsaturatedketone intermediate
NOVEL 1,2- AND 1,3-DOUBLE CHIRAL RECOGNITIONS. OPTICAL RESOLUTION OF α- AND β-HALOACETYLENIC ALCOHOLS BY COMPLEXATION WITH BRUCINE
作者:Fumio Toda、Koichi Tanaka、Koji Mori
DOI:10.1246/cl.1983.827
日期:1983.6.5
Optical resolution of α- (2,3) and β-haloacetylenic alcohols (13,14) which have two chiral carbons at the 1,2- and 1,3-positions, respectively, was performed efficiently by complexation with brucine. By the same method, α,β-dichloroacetylenic alcohols (8,9) which have three chiral carbons at the 1,2,3-positions were also resolved.
Synthesis of β-Haloketones by β-Addition Reactions of α,β-Unsaturated Ketones with BX<sub>3</sub>(X = Br, Cl) as Halide Source
作者:Adam Shih-Yuan Lee、Shu-Huei Wang、Yu-Ting Chang
DOI:10.1002/jccs.201300394
日期:2014.3
A series of β‐bromoketones and β‐chloroketones were synthesized by the addition reactions of α,β‐unsaturated ketones under BX3 (X = Br, Cl) and ethylene glycol reaction system. The α,β‐unsaturated ester also was successfully converted to its corresponding β‐bromoester under the reaction condition.