作者:Eiman H. Al-Mutairi、Stuart R. Crosby、Julia Darzi、Rachael A. Hughes、Thomas J. Simpson、Robert W. Smith、Christine L. Willis、John R. Harding、Clare D. King
DOI:10.1039/b101414p
日期:——
Cyclisation of homoallylic acetals under acidic conditions leads to the formation of 2,4,5-trisubstituted tetrahydropyrans with the creation of two new asymmetric centres with excellent stereocontrol. By varying the acid and the nucleophile, the reaction may be adapted for the preparation of 2,4,5-trisubstituted tetrahydropyrans with either a halide, alcohol, acetate or amide at C-4.
在酸性条件下高烯丙基缩醛的环化导致形成 2,4,5-三取代四氢吡喃,并产生两个具有出色立体控制的新不对称中心。通过改变酸和亲核试剂,该反应可适用于在 C-4 处用卤化物、醇、乙酸盐或酰胺制备 2,4,5-三取代四氢吡喃。