Rose Oxides: A Facile Chemo and Chemo‐Enzymatic Approach
摘要:
Nonracemic rose oxides were synthesized from racemic or nonracemic monoterpene alcohol citronellol by a novel chemo and chemo-enzymatic route. After the key step of bromomethoxylation of citronellol, the intermediate was dehydrobrominated by a base, followed by an acid catalyzed demethoxylation along with cyclization to furnish rose oxides in high yield. The racemic dehydrobrominated precursor was also kinetically resolved using various lipases to produce nonracemic rose oxides.
diffusible oxidised bromide species and the demonstrated regioselectivity is purely chemically controlled. The generated bromohydrins can be straightforward converted via two reactions steps into rose oxide which is a highly valuable flavour and fragrance substance.
Electrooxidative cleavage of carbon-carbon linkages. 1. Preparation of acyclic oxoalkanoates from 2-hydroxy- and 2-acetoxy-1-cycloalkanones and cycloalkanone enol acetates
作者:Sigeru Torii、Tsutomu Inokuchi、Ryu Oi
DOI:10.1021/jo00340a009
日期:1982.1
[DE] ORGANOSCHWEFELVERBINDUNGEN ALS RIECH- UND GESCHMACKSTOFFE<br/>[EN] ORGANOSULPHUR COMPOUNDS AS ODORANTS AND FLAVOURINGS<br/>[FR] COMPOSÉS ORGANOSOUFRÉS EN TANT QU'AGENTS PARFUMANTS ET AROMATISANTS
申请人:SYMRISE AG
公开号:WO2019037862A1
公开(公告)日:2019-02-28
Die Erfindung betrifft Organoschwefelverbindungen die sich aus Rosenoxid gewinnen lassen, die Verfahren zur Herstellung der Organoschwefelverbindungen und deren Verwendung als Riechstoffe, Geschmacksstoffe oder Inhaltsstoffe in Riechstoffmischungen und die davon abgeleiteten Produkte, insbesondere Parfümölkompositionen, Waschmittel und Duschgels.
Rose Oxides: A Facile Chemo and Chemo‐Enzymatic Approach
作者:Subhash C. Taneja、Vijay K. Sethi、Samar S. Andotra、Surrinder Koul、Ghulam N. Qazi
DOI:10.1080/00397910500186425
日期:2005.9.1
Nonracemic rose oxides were synthesized from racemic or nonracemic monoterpene alcohol citronellol by a novel chemo and chemo-enzymatic route. After the key step of bromomethoxylation of citronellol, the intermediate was dehydrobrominated by a base, followed by an acid catalyzed demethoxylation along with cyclization to furnish rose oxides in high yield. The racemic dehydrobrominated precursor was also kinetically resolved using various lipases to produce nonracemic rose oxides.