Regioselective reaction of allylbenzotriazoles with aldehydes and ketones in the presence of lithium

Article abstract of DOI:10.1016/S0040-4039(97)10601-3

The reactions of α- and γ-substituted allylbenzotriazoles 2, 3 and 4 with an excess of lithium in THF at -78°C generate various allyllithiums, which react readily with aldehydes and ketones with high regioselectivity to give predominantly the branched products 5 in excellent yields.