An efficient synthesis of dihydro- and tetrahydropyrans via oxonium–ene cyclization reaction
作者:Somasekhar Bondalapati、Udagandla C. Reddy、Pipas Saha、Anil K. Saikia
DOI:10.1039/c1ob00033k
日期:——
An efficient method has been developed for the synthesis of 2,3-dihydropyrans and 4-methylenetetrahydropyrans from aldehydes and substituted homoallyl alcohols in benzene mediated by borontrifluoride etherate in good yields. The reaction proceeds viaoxonium–ene reaction.