Synthesis of Natural Fragrant Molecules <i>cis</i>-3-Methyl-4-decanolide and Aerangis Lactone. General Enantioselective Routes to β,γ-<i>cis</i>-Disubstituted γ-Lactones and γ,δ-<i>cis</i>-Disubstituted δ-Lactones
作者:Yikang Wu、Xin Shen、Chao-Jun Tang、Zhi-Long Chen、Qi Hu、Wei Shi
DOI:10.1021/jo025540o
日期:2002.5.1
(S)-phenylalanine-derived 2-oxazolidinone or thiazolidinethione as chiralauxiliary, whereas the (S,S) ones were constructed with auxiliary prepared from (R)-phenylglycine. NaBH(4)/CaCl(2)/THF in the presence of a small amount of EtOH was introduced as a new effective method for reductive cleavage of chiral oxazolidinone auxiliaries. Previously unknown, tricky concentration effects were observed during the monotosylation