Synthesis with Perfect Atom Economy: Generation of Diazo Ketones by 1,3-Dipolar Cycloaddition of Nitrous Oxide at Cyclic Alkynes under Mild Conditions
作者:Klaus Banert、Oliver Plefka
DOI:10.1002/anie.201101326
日期:2011.6.27
A cascade of five steps, transforms cyclooctynes in the presence of nucleophiles NuH and nitrous oxide, into the depicted products (see scheme). In another example, nitrous oxide was added at a cycloalkyne at −25 °C to generate the corresponding diazo ketone. In both cases, all three atoms of nitrous oxide were incorporated into the products.
五个步骤的级联将亲核试剂NuH和一氧化二氮存在下的环辛炔转化为所示产物(请参阅方案)。在另一个实例中,在-25℃下在环炔处添加一氧化二氮以产生相应的重氮酮。在两种情况下,一氧化二氮的所有三个原子都被掺入产物中。