Studies in tetrahydrofuran synthesis. Complete β-lactone formation in the bromolactonization of A 2,4-disubstituted β, γ-unsaturated carboxylic acid
作者:Keith T. Mead、Minnie Park
DOI:10.1016/0040-4039(95)00034-a
日期:1995.2
A dienolate aldol/bromolactonization sequence has been used to demonstrate a new stereocontrolled route to protected alpha-(1-hydroxyalkyl) 2-oxetanones, and thus specifically functionalized tetrahydrofurans.
A new synthesis of substituted butenolides via cation-initiated ring expansion/elimination of β-lactones
作者:T.Howard Black、Huang Jianhua
DOI:10.1016/s0040-4039(00)60304-0
日期:1993.2
When treated with silver ion, gamma-bromo beta-lactones, available via bromolactonization, undergo a ring expansion/elimination reaction to afford substituted butenolides.
OKADA KATSUHIDE; KIYOOKA FUMIHARA; NAKANISHI EIJI; HIRANO MASACHIKA; OHNE+, AGR. AND BIOL. CHEM., 1980, 44, NO 11, 2595-2599
The present invention provides methods for producing derivatives from cultured cells. In addition, the present invention provides methods for conversion of prenyl derivatives, obtained from biological or petrochemical sources, to isoprene by employing chemical or biological catalysts. The present invention also provides compositions that include the cultured cells or isoprene or prenyl derivatives produced there from.