F. Jourdain et Jc. Pommelet, A NEW SYNTHETIC ROUTE TO MACROCYCLES - SYNTHESIS OF LARGE RING ENAMINOLACTONES, Tetrahedron letters, 35(10), 1994, pp. 1545-1548
Macrocyclic enaminolactones 5 are prepared in three steps from commerc
ialy available chloroalcohols 1. The cyclization step is performed by
intramolecular nucleophilic addition of the hydroxy group to an aminom
ethyleneketene generated by thermolysis.