1,3-Dienyl β-keto esters are cyclised into bicyclolactones using the Bi(OTf)3/TfOH catalytic system. This reaction represents a rare case of simultaneous C–C and C–O bond formation at positions 1 and 3 of a 1,3-diene. Application to the synthesis of ramulosin is presented.
METHOD FOR MANUFACTURING SPILANTHOL AND INTERMEDIATE MANUFACTURING PRODUCT THEREFOR
申请人:Tanaka Shigeru
公开号:US20120116116A1
公开(公告)日:2012-05-10
Provided is an amide ester that is useful as an intermediate manufacturing product for an aroma compound such as spilanthol or the like. Also provided is a spilanthol manufacturing method using said amide ester. High-purity spilanthol can be manufactured by reacting an amide ester represented by general formula (1) with a basic compound.
(In the formula, R
1
represents a phenyl group that may be substituted with a C
1-6
alkyl group and either a C
1-4
alkyl group, a C
1-4
alkoxy group, or a halogen atom; R
2
represents a C
1-8
hydrocarbon group; and the wavy lines represent cis configurations, trans configurations, or a mixture of the two configurations.)
A synthetic approach to actinobolin. Total synthesis of (±)-ramulosin
作者:Robert Cordova、Barry B. Snider
DOI:10.1016/s0040-4039(01)81333-2
日期:1984.1
biomimetic type synthesis of (±)-ramulosin from the acyclic precursor 9 is described. Mercury mediated oxidative cyclization and bromolactonization are shown to be useful for the construction of the actinobolin skeleton.
A heavy metal- and oxidant-free, one-pot synthesis of pyridines and fused pyridines based on a Lewis acid-catalyzed multicomponent reaction
作者:V. P. Alex Raja、Giammarco Tenti、Subbu Perumal、J. Carlos Menéndez
DOI:10.1039/c4cc01791a
日期:——
The InCl3-catalyzed sequential multicomponent reaction between 2-furfurylamine, β-dicarbonyl compounds and α,β-unsaturated aldehydes in ethanol, followed by microwave irradiation in solvent-free conditions, afforded good to excellent yields of highly substituted pyridines, with loss of a 2-furylmethyl side chain. The method was also adapted to the synthesis of quinolones, isoquinolines, phenanthridines
PRODUCTION METHOD OF (2E,6Z,8E)-N-ISOBUTYL-2,6,8-DECATRIENAMIDE (SPILANTHOL), AND FOOD OR DRINK, FRAGRANCE OR COSMETIC, OR PHARMACEUTICAL COMPRISING THE SAME
申请人:Tanaka Shigeru
公开号:US20110105773A1
公开(公告)日:2011-05-05
A problem as an object of the invention is to provide a production method of spilanthol in a large scale without using expensive reagents. The present invention provides a production method of N-isobutyl-2,6,8-decatrienamide, wherein a column chromatography purification step is not required in all processes.