S. Henrion, A. Macé, M. M. Vallejos, T. Roisnel, B. Carboni, J. M. Villalgordo and F. Carreaux
Org. Biomol. Chem., 2018,16, 1672-1678
DOI:
10.1039/C8OB00101D,
Paper
An efficient asymmetric synthesis of trans-4,5-disubstituted γ-butyrolactones from aldehydes and enantioenriched γ-carbamate alkenylboronates is reported. The cornerstone of this strategy is the implementation of sequential [3,3]-allyl cyanate rearrangement/allylboration/nucleophilic addition/cyclisation reactions. Diverse γ-butyrolactones such as the flavouring compounds, (+)-trans-whiskey lactone and (+)-trans-cognac lactone, as well as an advanced intermediate towards the first synthesis of natural products, (−)-nicotlactone B and (−)-galbacin, have thus been obtained.