Tosylate 1, which features the vitamin D triene unit, was stereoselectively synthesized from commercially available starting materials. This keyintermediate undergoes a very efficient one-pot, two-step reaction with tetrabutyl ammonium fluoride to afford vitamin D analogue 2, which bears a cyclic side chain. Reaction of 1 with lithium aluminium hydride and removal of the silyl protecting groups affords
Rapid access to a series of calcitriol analogues with restricted side chain conformation
作者:Carlos Fernández、Hugo Santalla、Fátima Garrido、Generosa Gómez、Yagamare Fall
DOI:10.1016/j.tetlet.2016.05.045
日期:2016.6
The synthesis of a series of calcitriol analogues with restricted sidechainconformation is described. C-22 modified calcitriol analogues have been prepared from a common intermediate, in which the labile triene system is already present.