@article{articlec65e808d,
title   = {Niobium (V) chloride mediated preparation of 'beta'-chloro-'alfa','beta'-unsaturated ketones},
author = {Constantino, Maurício Gomes and Lacerda Júnior, Valdemar and Silva Filho, Luiz Carlos da and Silva, Gil Valdo José da},
year = {2004},
journal   = {Letters in Organic Chemistry}
}