Unprecedented formation of a 14-membered dihydropyran macrocycle via sequential olefin cross metathesis-intramolecular hetero Diels–Alder reaction
作者:Kavirayani R. Prasad、S. Mothish Kumar
DOI:10.1016/j.tet.2013.05.032
日期:2013.8
Formation of a 2,3-dihydro-4H-pyran containing 14-memberedmacrocycle by sequential olefin cross metathesis and a highly regiospecific hetero Diels–Alder reaction was observed in the reaction of a hydroxydienone derived from tartaric acid with Grubbs' second generation catalyst. It was found that the free alcohol in the hydroxyenone led to the macrocycle formation, while protection of the hydroxy group