Toward the Synthesis of Spirastrellolide A: Construction of Two C1−C25 Diastereomers Containing the BC−Spiroacetal
摘要:
Stereocontrolled syntheses of two possible C-1-C-25 diastereomers of spirastrellolide A containing the cis-disubstituted tetrahydropyran and [6,6]-spiroacetal are reported, exploiting boron-mediated asymmetric aldol and allylation methodology.
Toward the Synthesis of Spirastrellolide A: Construction of Two C1−C25 Diastereomers Containing the BC−Spiroacetal
摘要:
Stereocontrolled syntheses of two possible C-1-C-25 diastereomers of spirastrellolide A containing the cis-disubstituted tetrahydropyran and [6,6]-spiroacetal are reported, exploiting boron-mediated asymmetric aldol and allylation methodology.
A highly enantioselective allyl-transfer through suppression of epimerization
作者:Cheng-Hsia Angeline Lee、Teck-Peng Loh
DOI:10.1016/j.tetlet.2004.06.014
日期:2004.7
A highlyenantioselective allyl transfer method was successfully developed, producing terminal homoallylic alcohols in moderate to high yields. In all cases, reactions were carried out under mild acid conditions; reducing the reaction temperature suppressed racemization.
Catalytic allylic transfer reactions of functionalized aldehydes promoted by BINOL-Ti(IV) with synergistic reagent
作者:Chan-Mo Yu、Ji-Min Kim、Mi-Sook Shin、Daejin Cho
DOI:10.1016/s0040-4039(03)01033-5
日期:2003.7
Practical and efficient catalytic asymmetric allylic transfer reactions of tin reagents promoted by BINOL-Ti[OCH(CF3)2]2 complex by the utilization of t-BuSBEt2 are successful with a variety of functionalized aldehydes containing ketone, aldehyde, ester, amide, or carbamoyl functionality and affords products in high levels of enantioselectivity.