METHOD OF PREPARATION OF HETEROCYCLIC MOLECULES WITH PHARMACEUTICAL PHARMACEUTICAL EXCIPIENT COSMECEUTICAL AGROCHEMICAL AND INDUSTRIAL USES

摘要

Processes for preparing racemic and optically pure 3,6-dihydro-2H-pyrans of formulae H, I, N and O are described. These compounds may be further transformed into compounds of formulae J, K, L, M, P, Q, S, T, U, V, Y and Z with potential pharmaceutical, pharmaceutical excipient, cosmeceutical, agrochemical and industrial applications.