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
An Expedient Synthesis of Olfactory Lactones by Intramolecular Hydroacylalkoxylation Reactions
作者:Luis A. Adrio、King Kuok Mimi Hii
DOI:10.1002/ejoc.201001556
日期:2011.4
available chiral precursor. By using an intramolecular hydroacylalkoxylation reaction in the final step, a correlation between the (E)/(Z) configuration of the precursor and the product distribution has been established, for the first time, in this type of cyclisation reactions.
Solid-Support Synthesis of 1,2-Diols and <i>γ</i>-Lactones Through Addition of <i>α</i>-(Benzoyloxy)crotylindium Reagents to Aldehydes
作者:Janine Cossy、Chrystelle Rasamison、Domingo Gomez Pardo、James A. Marshall
DOI:10.1055/s-2001-13367
日期:——
A procedure for the solid phase synthesis of 1,2-diols and γ-lactones from α-(hydroxy)crotylstannane has been developed through transmetalation with InBr3. A variety of 1,2-diols and γ-lactones were synthesized in satisfactory yields and, in some cases, with excellent diastereoselectivity. The products are formed free of tin contamination.