A short synthetic route to the tricyclic guanidinium core of the batzelladine alkaloids
作者:Gregory P. Black、Patrick J. Murphy、Nigel D.A. Walshe
DOI:10.1016/s0040-4020(98)00576-6
日期:1998.8
addition of guanidine to a series of bis-α,β-unsaturated ketones is reported leading to the formation of tricyclic guanidines, which are models of the naturally occurring batzelladinealkaloids. Nmr evidence is given in support of a new assignment for the relative stereochemistry of batzelladine F.
An intramolecular Baylis-Hillman reaction catalysed by secondary amines
作者:Gregory P. Black、Francesca Dinon、Silvia Fratucello、Patrick J. Murphy、Michael Nielsen、Harri Lloyd Williams、Nigel D.A. Walshe
DOI:10.1016/s0040-4039(97)10284-2
日期:1997.12
Treatment of enonealdehydes 4 or 7 with a catalytic amount of a secondary amine lead to the formation of the cyclopentenol 5 or cyclohexenol 8 respectively. Piperidine proved to be the most effective catalyst for this process.