A novel allylic transfer reaction of chirally modified 2-borylbutadiene: synthesis of chiral homoallenyl alcohols
作者:Jihoon Choi、Bobin Lee、Chan-Mo Yu
DOI:10.1039/c0cc05751g
日期:——
An enantioselective synthesis of the homoallenyl alcohols was achieved from the reaction of chiral 2-borylbutadiene with aldehydes through an allylictransfer reaction in good yields and enantioselectivities.
A Synthesis of Enantiomerically Pure (3<i>S</i>,6<i>R</i>)- and (3<i>R</i>,6<i>S</i>)-3,6-Dimethyltetrahydropyran-2-one
作者:Rosanna Bernardi、Dario Ghiringhelli
DOI:10.1055/s-1989-27436
日期:——
The title substances (3S,6R)-5 and 3R,6S)-5 were synthesized from enantiomerically pure (R)- and (S)-2-(2-hydroxypropyl)-1,3-dithiane (1), respectively, via a four-step sequence.
Acetoacetylated Meldrum's acid was enantioselectiviely reduced with fermenting baker'syeast to afford the corresponding chiral (S)-alcohol, which could be easily converted to δ-lactone derivatives.