Synthesis of chirally enriched 2,4-disubstituted tetrahydropyran-4-ol and its derivatives
申请人:S.H. KELKAR AND COMPANY LTD.
公开号:US10040775B2
公开(公告)日:2018-08-07
The present invention discloses a process for synthesis of chiral 2,4-disubstituted-tetrahydropyran-4-ol and its derivatives having a general formula (I) comprising of asymmetric reaction of an aliphatic aldehyde and a homoallylic alcohol in the presence of a chiral organocatalyst, and a fragrance and cosmetic composition containing chirally enriched molecules of the said general formula (I) prepared by the aforesaid process.
Solvent-free catalysed synthesis of tetrahydropyran odorants: the role of SiO
作者:Alexandra Macedo、Edison P. Wendler、Alcindo A. Dos Santos、Julio Zukerman-Schpector、Edward R. T. Tiekink
DOI:10.1590/s0103-50532010000800023
日期:——
An efficient, green and solvent-free catalysed Prins-cyclization reaction based on the simple grinding of an aldehyde and a homoallylic alcohol in the presence of catalytic amount of p-TSA on silica gel is reported. By this protocol were synthesized tetrahydropyran odorants including commercial Florol (R) and Clarycet (R), in one and two steps respectively.
[EN] SYNTHESIS OF CHIRALLY ENRICHED 2,4-DISUBSTITUTED TETRAHYDROPYRAN-4-OL AND ITS DERIVATIVES<br/>[FR] SYNTHÈSE DE TÉTRAHYDROPYRAN-4-OL 2,4-DISUBSTITUÉ À ENRICHISSEMENT CHIRAL ET DE SES DÉRIVÉS
申请人:S H KELKAR AND COMPANY LTD
公开号:WO2016059648A4
公开(公告)日:2016-07-07
SYNTHESIS OF CHIRALLY ENRICHED 2,4-DISUBSTITUTED TETRAHYDROPYRAN-4-OL AND ITS DERIVATIVES
申请人:S.H. KELKAR AND COMPANY LTD.
公开号:US20170247349A1
公开(公告)日:2017-08-31
The present invention discloses a process for synthesis of chiral 2,4-disubstituted-tetrahydropyran-4-ol and its derivatives having a general formula (I) comprising of asymmetric reaction of an aliphatic aldehyde and a homoallylic alcohol in the presence of a chiral organocatalyst, and a fragrance and cosmetic composition containing chirally enriched molecules of the said general formula (I) prepared by the aforesaid process.
Preparation of the Enantiomerically Enriched Isomers of the Odorous Cyclic EthersClarycet ®,Florol ®, andRhubafuran ® by Enzymatic Catalysis
作者:Agnese Abate、Elisabetta Brenna、Giovanni Fronza、Claudio Fuganti、Francesco G. Gatti、Stefano Serra、Enrica Zardoni
DOI:10.1002/hlca.200490075
日期:2004.4
All the enantiomericallyenriched stereoisomers of Clarycet ® (1), Florol ® (2), and Rhubafuran ® (3) were prepared by biocatalysis routes. Their absolute configurations were established, and their olfactory properties were fully evaluated.