Enantioselective Siloxybutylation of Aldehydes and Ketones by Lewis Acid Mediated Ring Opening of Tetrahydrofuran with Lithiated Hydrazones
作者:Braj B. Lohray、Dieter Enders
DOI:10.1055/s-1993-26007
日期:——
α-Siloxybutylated aldehydes and ketones 4 are synthesized in good overall yields and high enantiomeric purities (ee ≥ 95% ; 81%) by trialkylsilyl trifluoromethanesulfonate mediated ring opening of tetrahydrofuran with lithiated SAMP-/RAMP- or SADP-hydrazones.
Total Synthesis of Epothilone A: The Macrolactonization Approach
作者:K. C. Nicolaou、Francisco Sarabia、Sacha Ninkovic、Zhen Yang
DOI:10.1002/anie.199705251
日期:1997.3.14
US7169930B2
申请人:——
公开号:US7169930B2
公开(公告)日:2007-01-30
US7173137B2
申请人:——
公开号:US7173137B2
公开(公告)日:2007-02-06
Highly Enantioselective α-Alkenylation of Aldehydes and Ketones
作者:Dieter Enders、Darren L. Whitehouse
DOI:10.1055/s-1996-4263
日期:1996.5
The enantioselective synthesis of α-substituted β,γ-unsaturated aldehydes and ketones 6 via aldol reaction of SAMP-hydrazones (S)-2 with racemic α-phenylselenyl aldehydes 3 in good overall yields and high enantiomeric excesses (ee = 89-94%) is described.