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.
通过
三氟甲磺酸三烷基
硅酯介导的
四氢呋喃与
锂化
SAMP-/
RAMP- 或 S
ADP- 酰
肼的开环反应,合成了δ-
硅氧丁基醛和
酮 4,总产率高,对映体纯度高(ee ≥ 95% ; 81%)。